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Finding the Fourth Proportional to 256,805.40, 385,208.10 and 151,570.20

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Solution

The fourth proportional to 256,805.40, 385,208.10 and 151,570.20 is: 227,355.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,805.40 : 385,208.10 = 151,570.20 : x
  2. Step 2: Convert to fraction form
    256,805.40/385,208.10 = 151,570.20/x
  3. Step 3: Cross multiply
    256,805.40x = 385,208.10 × 151,570.20
  4. Step 4: Simplify right side
    256,805.40x = 58,386,068,758.62
  5. Step 5: Solve for x
    x = 58,386,068,758.62/256,805.40
  6. Step 6: Final answer
    x = 227,355.30

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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.