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Finding the Fourth Proportional to 699,146.40, 964,702.80 and 393,143.52

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Solution

The fourth proportional to 699,146.40, 964,702.80 and 393,143.52 is: 542,471.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,146.40 : 964,702.80 = 393,143.52 : x
  2. Step 2: Convert to fraction form
    699,146.40/964,702.80 = 393,143.52/x
  3. Step 3: Cross multiply
    699,146.40x = 964,702.80 × 393,143.52
  4. Step 4: Simplify right side
    699,146.40x = 379,266,654,545.86
  5. Step 5: Solve for x
    x = 379,266,654,545.86/699,146.40
  6. Step 6: Final answer
    x = 542,471.01

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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.