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Finding the Fourth Proportional to 659,456.64, 988,668.19 and 260,396.12

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Solution

The fourth proportional to 659,456.64, 988,668.19 and 260,396.12 is: 390,390.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,456.64 : 988,668.19 = 260,396.12 : x
  2. Step 2: Convert to fraction form
    659,456.64/988,668.19 = 260,396.12/x
  3. Step 3: Cross multiply
    659,456.64x = 988,668.19 × 260,396.12
  4. Step 4: Simplify right side
    659,456.64x = 257,445,360,643.42
  5. Step 5: Solve for x
    x = 257,445,360,643.42/659,456.64
  6. Step 6: Final answer
    x = 390,390.13

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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.