Home / 808,631.40-1,211,489.10-386,977.80

Finding the Fourth Proportional to 808,631.40, 1,211,489.10 and 386,977.80

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Solution

The fourth proportional to 808,631.40, 1,211,489.10 and 386,977.80 is: 579,768.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,631.40 : 1,211,489.10 = 386,977.80 : x
  2. Step 2: Convert to fraction form
    808,631.40/1,211,489.10 = 386,977.80/x
  3. Step 3: Cross multiply
    808,631.40x = 1,211,489.10 × 386,977.80
  4. Step 4: Simplify right side
    808,631.40x = 468,819,386,641.98
  5. Step 5: Solve for x
    x = 468,819,386,641.98/808,631.40
  6. Step 6: Final answer
    x = 579,768.96

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1.5x scale

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.