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Finding the Fourth Proportional to 540,136.76, 745,237.14 and 310,682.12

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Solution

The fourth proportional to 540,136.76, 745,237.14 and 310,682.12 is: 428,654.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    540,136.76 : 745,237.14 = 310,682.12 : x
  2. Step 2: Convert to fraction form
    540,136.76/745,237.14 = 310,682.12/x
  3. Step 3: Cross multiply
    540,136.76x = 745,237.14 × 310,682.12
  4. Step 4: Simplify right side
    540,136.76x = 231,531,854,557.94
  5. Step 5: Solve for x
    x = 231,531,854,557.94/540,136.76
  6. Step 6: Final answer
    x = 428,654.13

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.