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Finding the Fourth Proportional to 256,460.32, 384,642.16 and 69,447.20

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Solution

The fourth proportional to 256,460.32, 384,642.16 and 69,447.20 is: 104,157.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,460.32 : 384,642.16 = 69,447.20 : x
  2. Step 2: Convert to fraction form
    256,460.32/384,642.16 = 69,447.20/x
  3. Step 3: Cross multiply
    256,460.32x = 384,642.16 × 69,447.20
  4. Step 4: Simplify right side
    256,460.32x = 26,712,321,013.95
  5. Step 5: Solve for x
    x = 26,712,321,013.95/256,460.32
  6. Step 6: Final answer
    x = 104,157.72

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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.