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Finding the Fourth Proportional to 676,667.52, 933,900.60 and 390,131.52

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Solution

The fourth proportional to 676,667.52, 933,900.60 and 390,131.52 is: 538,438.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,667.52 : 933,900.60 = 390,131.52 : x
  2. Step 2: Convert to fraction form
    676,667.52/933,900.60 = 390,131.52/x
  3. Step 3: Cross multiply
    676,667.52x = 933,900.60 × 390,131.52
  4. Step 4: Simplify right side
    676,667.52x = 364,344,060,606.91
  5. Step 5: Solve for x
    x = 364,344,060,606.91/676,667.52
  6. Step 6: Final answer
    x = 538,438.82

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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.