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Finding the Fourth Proportional to 659,613.70, 989,124.90 and 260,048.80

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Solution

The fourth proportional to 659,613.70, 989,124.90 and 260,048.80 is: 389,956.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,613.70 : 989,124.90 = 260,048.80 : x
  2. Step 2: Convert to fraction form
    659,613.70/989,124.90 = 260,048.80/x
  3. Step 3: Cross multiply
    659,613.70x = 989,124.90 × 260,048.80
  4. Step 4: Simplify right side
    659,613.70x = 257,220,743,295.12
  5. Step 5: Solve for x
    x = 257,220,743,295.12/659,613.70
  6. Step 6: Final answer
    x = 389,956.64

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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.