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Finding the Fourth Proportional to 922,321.13, 1,272,803.15 and 519,913.13

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Solution

The fourth proportional to 922,321.13, 1,272,803.15 and 519,913.13 is: 717,480.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,321.13 : 1,272,803.15 = 519,913.13 : x
  2. Step 2: Convert to fraction form
    922,321.13/1,272,803.15 = 519,913.13/x
  3. Step 3: Cross multiply
    922,321.13x = 1,272,803.15 × 519,913.13
  4. Step 4: Simplify right side
    922,321.13x = 661,747,064,526.13
  5. Step 5: Solve for x
    x = 661,747,064,526.13/922,321.13
  6. Step 6: Final answer
    x = 717,480.11

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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.