Home / 686,712.40-1,030,225.20-213,445.60

Finding the Fourth Proportional to 686,712.40, 1,030,225.20 and 213,445.60

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Solution

The fourth proportional to 686,712.40, 1,030,225.20 and 213,445.60 is: 320,217.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,712.40 : 1,030,225.20 = 213,445.60 : x
  2. Step 2: Convert to fraction form
    686,712.40/1,030,225.20 = 213,445.60/x
  3. Step 3: Cross multiply
    686,712.40x = 1,030,225.20 × 213,445.60
  4. Step 4: Simplify right side
    686,712.40x = 219,897,035,949.12
  5. Step 5: Solve for x
    x = 219,897,035,949.12/686,712.40
  6. Step 6: Final answer
    x = 320,217.07

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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.