Home / 687,989.40-1,030,428.90-408,053.40

Finding the Fourth Proportional to 687,989.40, 1,030,428.90 and 408,053.40

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Solution

The fourth proportional to 687,989.40, 1,030,428.90 and 408,053.40 is: 611,157.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,989.40 : 1,030,428.90 = 408,053.40 : x
  2. Step 2: Convert to fraction form
    687,989.40/1,030,428.90 = 408,053.40/x
  3. Step 3: Cross multiply
    687,989.40x = 1,030,428.90 × 408,053.40
  4. Step 4: Simplify right side
    687,989.40x = 420,470,016,103.26
  5. Step 5: Solve for x
    x = 420,470,016,103.26/687,989.40
  6. Step 6: Final answer
    x = 611,157.70

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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.