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Finding the Fourth Proportional to 656,078.32, 984,428.52 and 390,363.76

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Solution

The fourth proportional to 656,078.32, 984,428.52 and 390,363.76 is: 585,730.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,078.32 : 984,428.52 = 390,363.76 : x
  2. Step 2: Convert to fraction form
    656,078.32/984,428.52 = 390,363.76/x
  3. Step 3: Cross multiply
    656,078.32x = 984,428.52 × 390,363.76
  4. Step 4: Simplify right side
    656,078.32x = 384,285,218,518.44
  5. Step 5: Solve for x
    x = 384,285,218,518.44/656,078.32
  6. Step 6: Final answer
    x = 585,730.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.