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Finding the Fourth Proportional to 384,311.60, 575,689.80 and 266,116.40

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Solution

The fourth proportional to 384,311.60, 575,689.80 and 266,116.40 is: 398,636.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,311.60 : 575,689.80 = 266,116.40 : x
  2. Step 2: Convert to fraction form
    384,311.60/575,689.80 = 266,116.40/x
  3. Step 3: Cross multiply
    384,311.60x = 575,689.80 × 266,116.40
  4. Step 4: Simplify right side
    384,311.60x = 153,200,497,092.72
  5. Step 5: Solve for x
    x = 153,200,497,092.72/384,311.60
  6. Step 6: Final answer
    x = 398,636.15

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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.