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Finding the Fourth Proportional to 521,936, 720,271.68 and 283,472

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Solution

The fourth proportional to 521,936, 720,271.68 and 283,472 is: 391,191.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,936 : 720,271.68 = 283,472 : x
  2. Step 2: Convert to fraction form
    521,936/720,271.68 = 283,472/x
  3. Step 3: Cross multiply
    521,936x = 720,271.68 × 283,472
  4. Step 4: Simplify right side
    521,936x = 204,176,853,672.96
  5. Step 5: Solve for x
    x = 204,176,853,672.96/521,936
  6. Step 6: Final answer
    x = 391,191.36

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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.