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Finding the Fourth Proportional to 845,479.88, 1,165,436.88 and 640,711.10

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Solution

The fourth proportional to 845,479.88, 1,165,436.88 and 640,711.10 is: 883,176.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    845,479.88 : 1,165,436.88 = 640,711.10 : x
  2. Step 2: Convert to fraction form
    845,479.88/1,165,436.88 = 640,711.10/x
  3. Step 3: Cross multiply
    845,479.88x = 1,165,436.88 × 640,711.10
  4. Step 4: Simplify right side
    845,479.88x = 746,708,345,365.37
  5. Step 5: Solve for x
    x = 746,708,345,365.37/845,479.88
  6. Step 6: Final answer
    x = 883,176.95

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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.