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Finding the Fourth Proportional to 690,551.60, 953,009.12 and 418,630.96

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Solution

The fourth proportional to 690,551.60, 953,009.12 and 418,630.96 is: 577,739.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,551.60 : 953,009.12 = 418,630.96 : x
  2. Step 2: Convert to fraction form
    690,551.60/953,009.12 = 418,630.96/x
  3. Step 3: Cross multiply
    690,551.60x = 953,009.12 × 418,630.96
  4. Step 4: Simplify right side
    690,551.60x = 398,959,115,936.16
  5. Step 5: Solve for x
    x = 398,959,115,936.16/690,551.60
  6. Step 6: Final answer
    x = 577,739.76

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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.