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Finding the Fourth Proportional to 476,637.75, 715,055.10 and 139,689.42

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Solution

The fourth proportional to 476,637.75, 715,055.10 and 139,689.42 is: 209,562.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    476,637.75 : 715,055.10 = 139,689.42 : x
  2. Step 2: Convert to fraction form
    476,637.75/715,055.10 = 139,689.42/x
  3. Step 3: Cross multiply
    476,637.75x = 715,055.10 × 139,689.42
  4. Step 4: Simplify right side
    476,637.75x = 99,885,632,187.04
  5. Step 5: Solve for x
    x = 99,885,632,187.04/476,637.75
  6. Step 6: Final answer
    x = 209,562.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.