Home / 687,287.60-1,030,960.56-213,981.92

Finding the Fourth Proportional to 687,287.60, 1,030,960.56 and 213,981.92

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Solution

The fourth proportional to 687,287.60, 1,030,960.56 and 213,981.92 is: 320,981.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,287.60 : 1,030,960.56 = 213,981.92 : x
  2. Step 2: Convert to fraction form
    687,287.60/1,030,960.56 = 213,981.92/x
  3. Step 3: Cross multiply
    687,287.60x = 1,030,960.56 × 213,981.92
  4. Step 4: Simplify right side
    687,287.60x = 220,606,920,073.08
  5. Step 5: Solve for x
    x = 220,606,920,073.08/687,287.60
  6. Step 6: Final answer
    x = 320,981.96

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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.