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Finding the Fourth Proportional to 718,543.86, 991,343.94 and 460,629.12

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Solution

The fourth proportional to 718,543.86, 991,343.94 and 460,629.12 is: 635,510.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,543.86 : 991,343.94 = 460,629.12 : x
  2. Step 2: Convert to fraction form
    718,543.86/991,343.94 = 460,629.12/x
  3. Step 3: Cross multiply
    718,543.86x = 991,343.94 × 460,629.12
  4. Step 4: Simplify right side
    718,543.86x = 456,641,886,699.53
  5. Step 5: Solve for x
    x = 456,641,886,699.53/718,543.86
  6. Step 6: Final answer
    x = 635,510.11

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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.