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Finding the Fourth Proportional to 309,655.20, 427,328.82 and 173,719.20

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Solution

The fourth proportional to 309,655.20, 427,328.82 and 173,719.20 is: 239,735.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,655.20 : 427,328.82 = 173,719.20 : x
  2. Step 2: Convert to fraction form
    309,655.20/427,328.82 = 173,719.20/x
  3. Step 3: Cross multiply
    309,655.20x = 427,328.82 × 173,719.20
  4. Step 4: Simplify right side
    309,655.20x = 74,235,220,747.34
  5. Step 5: Solve for x
    x = 74,235,220,747.34/309,655.20
  6. Step 6: Final answer
    x = 239,735.10

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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.