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Finding the Fourth Proportional to 538,853.40, 808,280.10 and 495,113.40

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Solution

The fourth proportional to 538,853.40, 808,280.10 and 495,113.40 is: 742,670.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,853.40 : 808,280.10 = 495,113.40 : x
  2. Step 2: Convert to fraction form
    538,853.40/808,280.10 = 495,113.40/x
  3. Step 3: Cross multiply
    538,853.40x = 808,280.10 × 495,113.40
  4. Step 4: Simplify right side
    538,853.40x = 400,190,308,463.34
  5. Step 5: Solve for x
    x = 400,190,308,463.34/538,853.40
  6. Step 6: Final answer
    x = 742,670.10

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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.