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Finding the Fourth Proportional to 428,070.64, 590,736 and 246,781.70

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Solution

The fourth proportional to 428,070.64, 590,736 and 246,781.70 is: 340,557.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,070.64 : 590,736 = 246,781.70 : x
  2. Step 2: Convert to fraction form
    428,070.64/590,736 = 246,781.70/x
  3. Step 3: Cross multiply
    428,070.64x = 590,736 × 246,781.70
  4. Step 4: Simplify right side
    428,070.64x = 145,782,834,331.20
  5. Step 5: Solve for x
    x = 145,782,834,331.20/428,070.64
  6. Step 6: Final answer
    x = 340,557.89

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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.