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Finding the Fourth Proportional to 393,073.08, 542,272.74 and 256,870.62

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Solution

The fourth proportional to 393,073.08, 542,272.74 and 256,870.62 is: 354,371.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,073.08 : 542,272.74 = 256,870.62 : x
  2. Step 2: Convert to fraction form
    393,073.08/542,272.74 = 256,870.62/x
  3. Step 3: Cross multiply
    393,073.08x = 542,272.74 × 256,870.62
  4. Step 4: Simplify right side
    393,073.08x = 139,293,934,932.90
  5. Step 5: Solve for x
    x = 139,293,934,932.90/393,073.08
  6. Step 6: Final answer
    x = 354,371.60

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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.