Home / 717,445.31-990,119.45-395,155.29

Finding the Fourth Proportional to 717,445.31, 990,119.45 and 395,155.29

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Solution

The fourth proportional to 717,445.31, 990,119.45 and 395,155.29 is: 545,339.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,445.31 : 990,119.45 = 395,155.29 : x
  2. Step 2: Convert to fraction form
    717,445.31/990,119.45 = 395,155.29/x
  3. Step 3: Cross multiply
    717,445.31x = 990,119.45 × 395,155.29
  4. Step 4: Simplify right side
    717,445.31x = 391,250,939,387.28
  5. Step 5: Solve for x
    x = 391,250,939,387.28/717,445.31
  6. Step 6: Final answer
    x = 545,339.04

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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.