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Finding the Fourth Proportional to 686,522.40, 1,029,476.40 and 265,658.40

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Solution

The fourth proportional to 686,522.40, 1,029,476.40 and 265,658.40 is: 398,368.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,522.40 : 1,029,476.40 = 265,658.40 : x
  2. Step 2: Convert to fraction form
    686,522.40/1,029,476.40 = 265,658.40/x
  3. Step 3: Cross multiply
    686,522.40x = 1,029,476.40 × 265,658.40
  4. Step 4: Simplify right side
    686,522.40x = 273,489,053,261.76
  5. Step 5: Solve for x
    x = 273,489,053,261.76/686,522.40
  6. Step 6: Final answer
    x = 398,368.73

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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.