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Finding the Fourth Proportional to 713,779.02, 985,042.62 and 391,502.70

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Solution

The fourth proportional to 713,779.02, 985,042.62 and 391,502.70 is: 540,288.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,779.02 : 985,042.62 = 391,502.70 : x
  2. Step 2: Convert to fraction form
    713,779.02/985,042.62 = 391,502.70/x
  3. Step 3: Cross multiply
    713,779.02x = 985,042.62 × 391,502.70
  4. Step 4: Simplify right side
    713,779.02x = 385,646,845,345.07
  5. Step 5: Solve for x
    x = 385,646,845,345.07/713,779.02
  6. Step 6: Final answer
    x = 540,288.85

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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.