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Finding the Fourth Proportional to 521,910.65, 720,254.43 and 497,995.81

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Solution

The fourth proportional to 521,910.65, 720,254.43 and 497,995.81 is: 687,251.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,910.65 : 720,254.43 = 497,995.81 : x
  2. Step 2: Convert to fraction form
    521,910.65/720,254.43 = 497,995.81/x
  3. Step 3: Cross multiply
    521,910.65x = 720,254.43 × 497,995.81
  4. Step 4: Simplify right side
    521,910.65x = 358,683,683,427.68
  5. Step 5: Solve for x
    x = 358,683,683,427.68/521,910.65
  6. Step 6: Final answer
    x = 687,251.13

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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.