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Finding the Fourth Proportional to 387,806.41, 581,550.40 and 148,007.64

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Solution

The fourth proportional to 387,806.41, 581,550.40 and 148,007.64 is: 221,950.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,806.41 : 581,550.40 = 148,007.64 : x
  2. Step 2: Convert to fraction form
    387,806.41/581,550.40 = 148,007.64/x
  3. Step 3: Cross multiply
    387,806.41x = 581,550.40 × 148,007.64
  4. Step 4: Simplify right side
    387,806.41x = 86,073,902,245.06
  5. Step 5: Solve for x
    x = 86,073,902,245.06/387,806.41
  6. Step 6: Final answer
    x = 221,950.70

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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.