Home / 687,908.60-1,031,862.90-660,352.40

Finding the Fourth Proportional to 687,908.60, 1,031,862.90 and 660,352.40

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Solution

The fourth proportional to 687,908.60, 1,031,862.90 and 660,352.40 is: 990,528.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,908.60 : 1,031,862.90 = 660,352.40 : x
  2. Step 2: Convert to fraction form
    687,908.60/1,031,862.90 = 660,352.40/x
  3. Step 3: Cross multiply
    687,908.60x = 1,031,862.90 × 660,352.40
  4. Step 4: Simplify right side
    687,908.60x = 681,393,142,485.96
  5. Step 5: Solve for x
    x = 681,393,142,485.96/687,908.60
  6. Step 6: Final answer
    x = 990,528.60

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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.