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Finding the Fourth Proportional to 257,490.30, 386,235.45 and 218,610.30

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Solution

The fourth proportional to 257,490.30, 386,235.45 and 218,610.30 is: 327,915.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,490.30 : 386,235.45 = 218,610.30 : x
  2. Step 2: Convert to fraction form
    257,490.30/386,235.45 = 218,610.30/x
  3. Step 3: Cross multiply
    257,490.30x = 386,235.45 × 218,610.30
  4. Step 4: Simplify right side
    257,490.30x = 84,435,047,595.14
  5. Step 5: Solve for x
    x = 84,435,047,595.14/257,490.30
  6. Step 6: Final answer
    x = 327,915.45

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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.