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Finding the Fourth Proportional to 663,613.65, 915,864.74 and 377,176.79

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Solution

The fourth proportional to 663,613.65, 915,864.74 and 377,176.79 is: 520,548.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,613.65 : 915,864.74 = 377,176.79 : x
  2. Step 2: Convert to fraction form
    663,613.65/915,864.74 = 377,176.79/x
  3. Step 3: Cross multiply
    663,613.65x = 915,864.74 × 377,176.79
  4. Step 4: Simplify right side
    663,613.65x = 345,442,922,707.39
  5. Step 5: Solve for x
    x = 345,442,922,707.39/663,613.65
  6. Step 6: Final answer
    x = 520,548.25

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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.