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Finding the Fourth Proportional to 660,023.70, 988,285.95 and 520,055.70

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Solution

The fourth proportional to 660,023.70, 988,285.95 and 520,055.70 is: 778,704.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,023.70 : 988,285.95 = 520,055.70 : x
  2. Step 2: Convert to fraction form
    660,023.70/988,285.95 = 520,055.70/x
  3. Step 3: Cross multiply
    660,023.70x = 988,285.95 × 520,055.70
  4. Step 4: Simplify right side
    660,023.70x = 513,963,741,527.42
  5. Step 5: Solve for x
    x = 513,963,741,527.42/660,023.70
  6. Step 6: Final answer
    x = 778,704.98

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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.