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Finding the Fourth Proportional to 643,325.68, 887,772.30 and 371,384.38

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Solution

The fourth proportional to 643,325.68, 887,772.30 and 371,384.38 is: 512,500.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,325.68 : 887,772.30 = 371,384.38 : x
  2. Step 2: Convert to fraction form
    643,325.68/887,772.30 = 371,384.38/x
  3. Step 3: Cross multiply
    643,325.68x = 887,772.30 × 371,384.38
  4. Step 4: Simplify right side
    643,325.68x = 329,704,765,216.67
  5. Step 5: Solve for x
    x = 329,704,765,216.67/643,325.68
  6. Step 6: Final answer
    x = 512,500.55

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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.