Home / 991,878.40-1,368,805.80-539,179.12

Finding the Fourth Proportional to 991,878.40, 1,368,805.80 and 539,179.12

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Solution

The fourth proportional to 991,878.40, 1,368,805.80 and 539,179.12 is: 744,074.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,878.40 : 1,368,805.80 = 539,179.12 : x
  2. Step 2: Convert to fraction form
    991,878.40/1,368,805.80 = 539,179.12/x
  3. Step 3: Cross multiply
    991,878.40x = 1,368,805.80 × 539,179.12
  4. Step 4: Simplify right side
    991,878.40x = 738,031,506,694.90
  5. Step 5: Solve for x
    x = 738,031,506,694.90/991,878.40
  6. Step 6: Final answer
    x = 744,074.58

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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.