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Finding the Fourth Proportional to 520,686.76, 718,920.12 and 406,093.42

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Solution

The fourth proportional to 520,686.76, 718,920.12 and 406,093.42 is: 560,699.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,686.76 : 718,920.12 = 406,093.42 : x
  2. Step 2: Convert to fraction form
    520,686.76/718,920.12 = 406,093.42/x
  3. Step 3: Cross multiply
    520,686.76x = 718,920.12 × 406,093.42
  4. Step 4: Simplify right side
    520,686.76x = 291,948,730,237.61
  5. Step 5: Solve for x
    x = 291,948,730,237.61/520,686.76
  6. Step 6: Final answer
    x = 560,699.35

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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.