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Finding the Fourth Proportional to 667,686.40, 999,686.40 and 520,230.40

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Solution

The fourth proportional to 667,686.40, 999,686.40 and 520,230.40 is: 778,909.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,686.40 : 999,686.40 = 520,230.40 : x
  2. Step 2: Convert to fraction form
    667,686.40/999,686.40 = 520,230.40/x
  3. Step 3: Cross multiply
    667,686.40x = 999,686.40 × 520,230.40
  4. Step 4: Simplify right side
    667,686.40x = 520,067,255,746.56
  5. Step 5: Solve for x
    x = 520,067,255,746.56/667,686.40
  6. Step 6: Final answer
    x = 778,909.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.