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Finding the Fourth Proportional to 660,013.70, 988,270.95 and 520,045.70

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Solution

The fourth proportional to 660,013.70, 988,270.95 and 520,045.70 is: 778,689.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,013.70 : 988,270.95 = 520,045.70 : x
  2. Step 2: Convert to fraction form
    660,013.70/988,270.95 = 520,045.70/x
  3. Step 3: Cross multiply
    660,013.70x = 988,270.95 × 520,045.70
  4. Step 4: Simplify right side
    660,013.70x = 513,946,057,982.42
  5. Step 5: Solve for x
    x = 513,946,057,982.42/660,013.70
  6. Step 6: Final answer
    x = 778,689.98

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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.