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Finding the Fourth Proportional to 676,515.92, 933,364.50 and 390,029.72

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Solution

The fourth proportional to 676,515.92, 933,364.50 and 390,029.72 is: 538,109.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,515.92 : 933,364.50 = 390,029.72 : x
  2. Step 2: Convert to fraction form
    676,515.92/933,364.50 = 390,029.72/x
  3. Step 3: Cross multiply
    676,515.92x = 933,364.50 × 390,029.72
  4. Step 4: Simplify right side
    676,515.92x = 364,039,894,592.94
  5. Step 5: Solve for x
    x = 364,039,894,592.94/676,515.92
  6. Step 6: Final answer
    x = 538,109.87

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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.