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Finding the Fourth Proportional to 692,685.80, 955,897.28 and 386,767.40

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Solution

The fourth proportional to 692,685.80, 955,897.28 and 386,767.40 is: 533,733.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,685.80 : 955,897.28 = 386,767.40 : x
  2. Step 2: Convert to fraction form
    692,685.80/955,897.28 = 386,767.40/x
  3. Step 3: Cross multiply
    692,685.80x = 955,897.28 × 386,767.40
  4. Step 4: Simplify right side
    692,685.80x = 369,709,905,652.67
  5. Step 5: Solve for x
    x = 369,709,905,652.67/692,685.80
  6. Step 6: Final answer
    x = 533,733.92

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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.