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Finding the Fourth Proportional to 523,307.40, 784,961.10 and 129,323.40

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Solution

The fourth proportional to 523,307.40, 784,961.10 and 129,323.40 is: 193,985.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    523,307.40 : 784,961.10 = 129,323.40 : x
  2. Step 2: Convert to fraction form
    523,307.40/784,961.10 = 129,323.40/x
  3. Step 3: Cross multiply
    523,307.40x = 784,961.10 × 129,323.40
  4. Step 4: Simplify right side
    523,307.40x = 101,513,838,319.74
  5. Step 5: Solve for x
    x = 101,513,838,319.74/523,307.40
  6. Step 6: Final answer
    x = 193,985.10

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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.