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Finding the Fourth Proportional to 538,703.60, 808,055.40 and 389,404.40

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Solution

The fourth proportional to 538,703.60, 808,055.40 and 389,404.40 is: 584,106.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,703.60 : 808,055.40 = 389,404.40 : x
  2. Step 2: Convert to fraction form
    538,703.60/808,055.40 = 389,404.40/x
  3. Step 3: Cross multiply
    538,703.60x = 808,055.40 × 389,404.40
  4. Step 4: Simplify right side
    538,703.60x = 314,660,328,203.76
  5. Step 5: Solve for x
    x = 314,660,328,203.76/538,703.60
  6. Step 6: Final answer
    x = 584,106.60

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.