Home / 970,581.36-1,338,689.34-643,302.48

Finding the Fourth Proportional to 970,581.36, 1,338,689.34 and 643,302.48

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Solution

The fourth proportional to 970,581.36, 1,338,689.34 and 643,302.48 is: 887,284.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    970,581.36 : 1,338,689.34 = 643,302.48 : x
  2. Step 2: Convert to fraction form
    970,581.36/1,338,689.34 = 643,302.48/x
  3. Step 3: Cross multiply
    970,581.36x = 1,338,689.34 × 643,302.48
  4. Step 4: Simplify right side
    970,581.36x = 861,182,172,371.56
  5. Step 5: Solve for x
    x = 861,182,172,371.56/970,581.36
  6. Step 6: Final answer
    x = 887,284.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.