Home / 718,403.16-991,394.60-396,118.34

Finding the Fourth Proportional to 718,403.16, 991,394.60 and 396,118.34

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Solution

The fourth proportional to 718,403.16, 991,394.60 and 396,118.34 is: 546,642.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,403.16 : 991,394.60 = 396,118.34 : x
  2. Step 2: Convert to fraction form
    718,403.16/991,394.60 = 396,118.34/x
  3. Step 3: Cross multiply
    718,403.16x = 991,394.60 × 396,118.34
  4. Step 4: Simplify right side
    718,403.16x = 392,709,583,236.96
  5. Step 5: Solve for x
    x = 392,709,583,236.96/718,403.16
  6. Step 6: Final answer
    x = 546,642.34

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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.