Home / 718,144.09-991,038.60-395,859.57

Finding the Fourth Proportional to 718,144.09, 991,038.60 and 395,859.57

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Solution

The fourth proportional to 718,144.09, 991,038.60 and 395,859.57 is: 546,286.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,144.09 : 991,038.60 = 395,859.57 : x
  2. Step 2: Convert to fraction form
    718,144.09/991,038.60 = 395,859.57/x
  3. Step 3: Cross multiply
    718,144.09x = 991,038.60 × 395,859.57
  4. Step 4: Simplify right side
    718,144.09x = 392,312,114,049.40
  5. Step 5: Solve for x
    x = 392,312,114,049.40/718,144.09
  6. Step 6: Final answer
    x = 546,286.07

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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.