Home / 687,985.40-1,030,422.90-408,049.40

Finding the Fourth Proportional to 687,985.40, 1,030,422.90 and 408,049.40

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Solution

The fourth proportional to 687,985.40, 1,030,422.90 and 408,049.40 is: 611,151.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,985.40 : 1,030,422.90 = 408,049.40 : x
  2. Step 2: Convert to fraction form
    687,985.40/1,030,422.90 = 408,049.40/x
  3. Step 3: Cross multiply
    687,985.40x = 1,030,422.90 × 408,049.40
  4. Step 4: Simplify right side
    687,985.40x = 420,463,446,091.26
  5. Step 5: Solve for x
    x = 420,463,446,091.26/687,985.40
  6. Step 6: Final answer
    x = 611,151.70

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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.