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Finding the Fourth Proportional to 498,700.80, 687,495.60 and 307,586.16

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Solution

The fourth proportional to 498,700.80, 687,495.60 and 307,586.16 is: 424,030.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,700.80 : 687,495.60 = 307,586.16 : x
  2. Step 2: Convert to fraction form
    498,700.80/687,495.60 = 307,586.16/x
  3. Step 3: Cross multiply
    498,700.80x = 687,495.60 × 307,586.16
  4. Step 4: Simplify right side
    498,700.80x = 211,464,131,620.90
  5. Step 5: Solve for x
    x = 211,464,131,620.90/498,700.80
  6. Step 6: Final answer
    x = 424,030.06

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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.