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Finding the Fourth Proportional to 538,890.80, 808,336.20 and 360,431.60

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Solution

The fourth proportional to 538,890.80, 808,336.20 and 360,431.60 is: 540,647.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,890.80 : 808,336.20 = 360,431.60 : x
  2. Step 2: Convert to fraction form
    538,890.80/808,336.20 = 360,431.60/x
  3. Step 3: Cross multiply
    538,890.80x = 808,336.20 × 360,431.60
  4. Step 4: Simplify right side
    538,890.80x = 291,349,909,903.92
  5. Step 5: Solve for x
    x = 291,349,909,903.92/538,890.80
  6. Step 6: Final answer
    x = 540,647.40

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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.