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Finding the Fourth Proportional to 389,888.83, 583,502.59 and 326,780.21

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Solution

The fourth proportional to 389,888.83, 583,502.59 and 326,780.21 is: 489,055.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,888.83 : 583,502.59 = 326,780.21 : x
  2. Step 2: Convert to fraction form
    389,888.83/583,502.59 = 326,780.21/x
  3. Step 3: Cross multiply
    389,888.83x = 583,502.59 × 326,780.21
  4. Step 4: Simplify right side
    389,888.83x = 190,677,098,895.74
  5. Step 5: Solve for x
    x = 190,677,098,895.74/389,888.83
  6. Step 6: Final answer
    x = 489,055.04

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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.