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Finding the Fourth Proportional to 666,970.80, 1,000,585.80 and 287,890.80

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Solution

The fourth proportional to 666,970.80, 1,000,585.80 and 287,890.80 is: 431,892.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,970.80 : 1,000,585.80 = 287,890.80 : x
  2. Step 2: Convert to fraction form
    666,970.80/1,000,585.80 = 287,890.80/x
  3. Step 3: Cross multiply
    666,970.80x = 1,000,585.80 × 287,890.80
  4. Step 4: Simplify right side
    666,970.80x = 288,059,446,430.64
  5. Step 5: Solve for x
    x = 288,059,446,430.64/666,970.80
  6. Step 6: Final answer
    x = 431,892.14

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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.