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Finding the Fourth Proportional to 476,876.86, 715,426.02 and 139,903.90

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Solution

The fourth proportional to 476,876.86, 715,426.02 and 139,903.90 is: 209,888.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    476,876.86 : 715,426.02 = 139,903.90 : x
  2. Step 2: Convert to fraction form
    476,876.86/715,426.02 = 139,903.90/x
  3. Step 3: Cross multiply
    476,876.86x = 715,426.02 × 139,903.90
  4. Step 4: Simplify right side
    476,876.86x = 100,090,890,359.48
  5. Step 5: Solve for x
    x = 100,090,890,359.48/476,876.86
  6. Step 6: Final answer
    x = 209,888.34

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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.