Home / 718,539.48-991,570.68-396,279.36

Finding the Fourth Proportional to 718,539.48, 991,570.68 and 396,279.36

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Solution

The fourth proportional to 718,539.48, 991,570.68 and 396,279.36 is: 546,857.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,539.48 : 991,570.68 = 396,279.36 : x
  2. Step 2: Convert to fraction form
    718,539.48/991,570.68 = 396,279.36/x
  3. Step 3: Cross multiply
    718,539.48x = 991,570.68 × 396,279.36
  4. Step 4: Simplify right side
    718,539.48x = 392,938,994,465.17
  5. Step 5: Solve for x
    x = 392,938,994,465.17/718,539.48
  6. Step 6: Final answer
    x = 546,857.90

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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.