Home / 687,919.60-1,031,879.40-660,363.40

Finding the Fourth Proportional to 687,919.60, 1,031,879.40 and 660,363.40

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Solution

The fourth proportional to 687,919.60, 1,031,879.40 and 660,363.40 is: 990,545.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,919.60 : 1,031,879.40 = 660,363.40 : x
  2. Step 2: Convert to fraction form
    687,919.60/1,031,879.40 = 660,363.40/x
  3. Step 3: Cross multiply
    687,919.60x = 1,031,879.40 × 660,363.40
  4. Step 4: Simplify right side
    687,919.60x = 681,415,388,973.96
  5. Step 5: Solve for x
    x = 681,415,388,973.96/687,919.60
  6. Step 6: Final answer
    x = 990,545.10

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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.