Home / 687,547.60-1,031,321.40-640,891.60

Finding the Fourth Proportional to 687,547.60, 1,031,321.40 and 640,891.60

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Solution

The fourth proportional to 687,547.60, 1,031,321.40 and 640,891.60 is: 961,337.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,547.60 : 1,031,321.40 = 640,891.60 : x
  2. Step 2: Convert to fraction form
    687,547.60/1,031,321.40 = 640,891.60/x
  3. Step 3: Cross multiply
    687,547.60x = 1,031,321.40 × 640,891.60
  4. Step 4: Simplify right side
    687,547.60x = 660,965,222,160.24
  5. Step 5: Solve for x
    x = 660,965,222,160.24/687,547.60
  6. Step 6: Final answer
    x = 961,337.40

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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.