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Finding the Fourth Proportional to 659,607.20, 989,115.15 and 260,042.30

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Solution

The fourth proportional to 659,607.20, 989,115.15 and 260,042.30 is: 389,946.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,607.20 : 989,115.15 = 260,042.30 : x
  2. Step 2: Convert to fraction form
    659,607.20/989,115.15 = 260,042.30/x
  3. Step 3: Cross multiply
    659,607.20x = 989,115.15 × 260,042.30
  4. Step 4: Simplify right side
    659,607.20x = 257,211,778,570.85
  5. Step 5: Solve for x
    x = 257,211,778,570.85/659,607.20
  6. Step 6: Final answer
    x = 389,946.89

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1.5x scale

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.