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Finding the Fourth Proportional to 611,003.60, 916,724.10 and 256,126.40

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Solution

The fourth proportional to 611,003.60, 916,724.10 and 256,126.40 is: 384,281.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,003.60 : 916,724.10 = 256,126.40 : x
  2. Step 2: Convert to fraction form
    611,003.60/916,724.10 = 256,126.40/x
  3. Step 3: Cross multiply
    611,003.60x = 916,724.10 × 256,126.40
  4. Step 4: Simplify right side
    611,003.60x = 234,797,243,526.24
  5. Step 5: Solve for x
    x = 234,797,243,526.24/611,003.60
  6. Step 6: Final answer
    x = 384,281.28

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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.