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Finding the Fourth Proportional to 660,024.20, 988,286.70 and 520,056.20

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Solution

The fourth proportional to 660,024.20, 988,286.70 and 520,056.20 is: 778,705.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,024.20 : 988,286.70 = 520,056.20 : x
  2. Step 2: Convert to fraction form
    660,024.20/988,286.70 = 520,056.20/x
  3. Step 3: Cross multiply
    660,024.20x = 988,286.70 × 520,056.20
  4. Step 4: Simplify right side
    660,024.20x = 513,964,625,712.54
  5. Step 5: Solve for x
    x = 513,964,625,712.54/660,024.20
  6. Step 6: Final answer
    x = 778,705.73

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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.