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Finding the Fourth Proportional to 486,098.40, 670,715.61 and 279,326.85

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Solution

The fourth proportional to 486,098.40, 670,715.61 and 279,326.85 is: 385,413.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,098.40 : 670,715.61 = 279,326.85 : x
  2. Step 2: Convert to fraction form
    486,098.40/670,715.61 = 279,326.85/x
  3. Step 3: Cross multiply
    486,098.40x = 670,715.61 × 279,326.85
  4. Step 4: Simplify right side
    486,098.40x = 187,348,878,587.13
  5. Step 5: Solve for x
    x = 187,348,878,587.13/486,098.40
  6. Step 6: Final answer
    x = 385,413.49

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1.5x scale

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.