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Finding the Fourth Proportional to 698,976.74, 964,568.76 and 393,045.21

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Solution

The fourth proportional to 698,976.74, 964,568.76 and 393,045.21 is: 542,391.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,976.74 : 964,568.76 = 393,045.21 : x
  2. Step 2: Convert to fraction form
    698,976.74/964,568.76 = 393,045.21/x
  3. Step 3: Cross multiply
    698,976.74x = 964,568.76 × 393,045.21
  4. Step 4: Simplify right side
    698,976.74x = 379,119,129,359.72
  5. Step 5: Solve for x
    x = 379,119,129,359.72/698,976.74
  6. Step 6: Final answer
    x = 542,391.62

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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.