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Finding the Fourth Proportional to 724,762.89, 999,009.45 and 492,117.12

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Solution

The fourth proportional to 724,762.89, 999,009.45 and 492,117.12 is: 678,331.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,762.89 : 999,009.45 = 492,117.12 : x
  2. Step 2: Convert to fraction form
    724,762.89/999,009.45 = 492,117.12/x
  3. Step 3: Cross multiply
    724,762.89x = 999,009.45 × 492,117.12
  4. Step 4: Simplify right side
    724,762.89x = 491,629,653,386.78
  5. Step 5: Solve for x
    x = 491,629,653,386.78/724,762.89
  6. Step 6: Final answer
    x = 678,331.71

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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.