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Finding the Fourth Proportional to 659,622.60, 989,433.90 and 260,130.60

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Solution

The fourth proportional to 659,622.60, 989,433.90 and 260,130.60 is: 390,195.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,622.60 : 989,433.90 = 260,130.60 : x
  2. Step 2: Convert to fraction form
    659,622.60/989,433.90 = 260,130.60/x
  3. Step 3: Cross multiply
    659,622.60x = 989,433.90 × 260,130.60
  4. Step 4: Simplify right side
    659,622.60x = 257,382,034,067.34
  5. Step 5: Solve for x
    x = 257,382,034,067.34/659,622.60
  6. Step 6: Final answer
    x = 390,195.90

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Similar ratio
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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.