Home / 718,285.32-991,203.89-391,591.26

Finding the Fourth Proportional to 718,285.32, 991,203.89 and 391,591.26

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Solution

The fourth proportional to 718,285.32, 991,203.89 and 391,591.26 is: 540,379.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,285.32 : 991,203.89 = 391,591.26 : x
  2. Step 2: Convert to fraction form
    718,285.32/991,203.89 = 391,591.26/x
  3. Step 3: Cross multiply
    718,285.32x = 991,203.89 × 391,591.26
  4. Step 4: Simplify right side
    718,285.32x = 388,146,778,244.05
  5. Step 5: Solve for x
    x = 388,146,778,244.05/718,285.32
  6. Step 6: Final answer
    x = 540,379.66

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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.