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Finding the Fourth Proportional to 663,608.70, 915,740.55 and 377,089.02

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Solution

The fourth proportional to 663,608.70, 915,740.55 and 377,089.02 is: 520,360.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,608.70 : 915,740.55 = 377,089.02 : x
  2. Step 2: Convert to fraction form
    663,608.70/915,740.55 = 377,089.02/x
  3. Step 3: Cross multiply
    663,608.70x = 915,740.55 × 377,089.02
  4. Step 4: Simplify right side
    663,608.70x = 345,315,706,573.76
  5. Step 5: Solve for x
    x = 345,315,706,573.76/663,608.70
  6. Step 6: Final answer
    x = 520,360.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.