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Finding the Fourth Proportional to 661,251.14, 911,681.78 and 428,266.42

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Solution

The fourth proportional to 661,251.14, 911,681.78 and 428,266.42 is: 590,460.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,251.14 : 911,681.78 = 428,266.42 : x
  2. Step 2: Convert to fraction form
    661,251.14/911,681.78 = 428,266.42/x
  3. Step 3: Cross multiply
    661,251.14x = 911,681.78 × 428,266.42
  4. Step 4: Simplify right side
    661,251.14x = 390,442,692,099.83
  5. Step 5: Solve for x
    x = 390,442,692,099.83/661,251.14
  6. Step 6: Final answer
    x = 590,460.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.