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Finding the Fourth Proportional to 257,434.40, 386,151.60 and 243,000.20

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Solution

The fourth proportional to 257,434.40, 386,151.60 and 243,000.20 is: 364,500.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,434.40 : 386,151.60 = 243,000.20 : x
  2. Step 2: Convert to fraction form
    257,434.40/386,151.60 = 243,000.20/x
  3. Step 3: Cross multiply
    257,434.40x = 386,151.60 × 243,000.20
  4. Step 4: Simplify right side
    257,434.40x = 93,834,916,030.32
  5. Step 5: Solve for x
    x = 93,834,916,030.32/257,434.40
  6. Step 6: Final answer
    x = 364,500.30

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1.5x scale

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.