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Finding the Fourth Proportional to 659,615.20, 989,127.15 and 260,050.30

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Solution

The fourth proportional to 659,615.20, 989,127.15 and 260,050.30 is: 389,958.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,615.20 : 989,127.15 = 260,050.30 : x
  2. Step 2: Convert to fraction form
    659,615.20/989,127.15 = 260,050.30/x
  3. Step 3: Cross multiply
    659,615.20x = 989,127.15 × 260,050.30
  4. Step 4: Simplify right side
    659,615.20x = 257,222,812,095.65
  5. Step 5: Solve for x
    x = 257,222,812,095.65/659,615.20
  6. Step 6: Final answer
    x = 389,958.89

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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.