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Finding the Fourth Proportional to 660,012.70, 988,269.45 and 520,044.70

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Solution

The fourth proportional to 660,012.70, 988,269.45 and 520,044.70 is: 778,688.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,012.70 : 988,269.45 = 520,044.70 : x
  2. Step 2: Convert to fraction form
    660,012.70/988,269.45 = 520,044.70/x
  3. Step 3: Cross multiply
    660,012.70x = 988,269.45 × 520,044.70
  4. Step 4: Simplify right side
    660,012.70x = 513,944,289,644.42
  5. Step 5: Solve for x
    x = 513,944,289,644.42/660,012.70
  6. Step 6: Final answer
    x = 778,688.49

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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.