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Finding the Fourth Proportional to 538,909.30, 808,363.95 and 489,045.70

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Solution

The fourth proportional to 538,909.30, 808,363.95 and 489,045.70 is: 733,568.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,909.30 : 808,363.95 = 489,045.70 : x
  2. Step 2: Convert to fraction form
    538,909.30/808,363.95 = 489,045.70/x
  3. Step 3: Cross multiply
    538,909.30x = 808,363.95 × 489,045.70
  4. Step 4: Simplify right side
    538,909.30x = 395,326,913,782.52
  5. Step 5: Solve for x
    x = 395,326,913,782.52/538,909.30
  6. Step 6: Final answer
    x = 733,568.55

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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.