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Finding the Fourth Proportional to 713,767.65, 985,035.45 and 391,507.74

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Solution

The fourth proportional to 713,767.65, 985,035.45 and 391,507.74 is: 540,300.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,767.65 : 985,035.45 = 391,507.74 : x
  2. Step 2: Convert to fraction form
    713,767.65/985,035.45 = 391,507.74/x
  3. Step 3: Cross multiply
    713,767.65x = 985,035.45 × 391,507.74
  4. Step 4: Simplify right side
    713,767.65x = 385,649,002,849.38
  5. Step 5: Solve for x
    x = 385,649,002,849.38/713,767.65
  6. Step 6: Final answer
    x = 540,300.48

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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.