Home / 690,665.28-953,161.98-418,759.20

Finding the Fourth Proportional to 690,665.28, 953,161.98 and 418,759.20

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Solution

The fourth proportional to 690,665.28, 953,161.98 and 418,759.20 is: 577,914.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,665.28 : 953,161.98 = 418,759.20 : x
  2. Step 2: Convert to fraction form
    690,665.28/953,161.98 = 418,759.20/x
  3. Step 3: Cross multiply
    690,665.28x = 953,161.98 × 418,759.20
  4. Step 4: Simplify right side
    690,665.28x = 399,145,348,215.22
  5. Step 5: Solve for x
    x = 399,145,348,215.22/690,665.28
  6. Step 6: Final answer
    x = 577,914.31

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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.