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Finding the Fourth Proportional to 660,072.70, 988,359.45 and 520,104.70

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Solution

The fourth proportional to 660,072.70, 988,359.45 and 520,104.70 is: 778,778.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,072.70 : 988,359.45 = 520,104.70 : x
  2. Step 2: Convert to fraction form
    660,072.70/988,359.45 = 520,104.70/x
  3. Step 3: Cross multiply
    660,072.70x = 988,359.45 × 520,104.70
  4. Step 4: Simplify right side
    660,072.70x = 514,050,395,234.42
  5. Step 5: Solve for x
    x = 514,050,395,234.42/660,072.70
  6. Step 6: Final answer
    x = 778,778.45

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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.