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Finding the Fourth Proportional to 326,605.79, 489,966.10 and 149,130.74

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Solution

The fourth proportional to 326,605.79, 489,966.10 and 149,130.74 is: 223,722.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,605.79 : 489,966.10 = 149,130.74 : x
  2. Step 2: Convert to fraction form
    326,605.79/489,966.10 = 149,130.74/x
  3. Step 3: Cross multiply
    326,605.79x = 489,966.10 × 149,130.74
  4. Step 4: Simplify right side
    326,605.79x = 73,069,007,920.00
  5. Step 5: Solve for x
    x = 73,069,007,920.00/326,605.79
  6. Step 6: Final answer
    x = 223,722.33

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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.