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Finding the Fourth Proportional to 690,578.24, 953,045.85 and 418,657.59

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Solution

The fourth proportional to 690,578.24, 953,045.85 and 418,657.59 is: 577,776.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,578.24 : 953,045.85 = 418,657.59 : x
  2. Step 2: Convert to fraction form
    690,578.24/953,045.85 = 418,657.59/x
  3. Step 3: Cross multiply
    690,578.24x = 953,045.85 × 418,657.59
  4. Step 4: Simplify right side
    690,578.24x = 398,999,878,720.50
  5. Step 5: Solve for x
    x = 398,999,878,720.50/690,578.24
  6. Step 6: Final answer
    x = 577,776.50

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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.