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Finding the Fourth Proportional to 256,948.80, 385,423.20 and 162,470.40

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Solution

The fourth proportional to 256,948.80, 385,423.20 and 162,470.40 is: 243,705.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,948.80 : 385,423.20 = 162,470.40 : x
  2. Step 2: Convert to fraction form
    256,948.80/385,423.20 = 162,470.40/x
  3. Step 3: Cross multiply
    256,948.80x = 385,423.20 × 162,470.40
  4. Step 4: Simplify right side
    256,948.80x = 62,619,861,473.28
  5. Step 5: Solve for x
    x = 62,619,861,473.28/256,948.80
  6. Step 6: Final answer
    x = 243,705.60

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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.