Home / 687,234.60-1,030,928.70-213,916.20

Finding the Fourth Proportional to 687,234.60, 1,030,928.70 and 213,916.20

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Solution

The fourth proportional to 687,234.60, 1,030,928.70 and 213,916.20 is: 320,898.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,234.60 : 1,030,928.70 = 213,916.20 : x
  2. Step 2: Convert to fraction form
    687,234.60/1,030,928.70 = 213,916.20/x
  3. Step 3: Cross multiply
    687,234.60x = 1,030,928.70 × 213,916.20
  4. Step 4: Simplify right side
    687,234.60x = 220,532,349,974.94
  5. Step 5: Solve for x
    x = 220,532,349,974.94/687,234.60
  6. Step 6: Final answer
    x = 320,898.21

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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.