Home / 721,271.10-995,348.07-398,977.50

Finding the Fourth Proportional to 721,271.10, 995,348.07 and 398,977.50

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Solution

The fourth proportional to 721,271.10, 995,348.07 and 398,977.50 is: 550,585.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,271.10 : 995,348.07 = 398,977.50 : x
  2. Step 2: Convert to fraction form
    721,271.10/995,348.07 = 398,977.50/x
  3. Step 3: Cross multiply
    721,271.10x = 995,348.07 × 398,977.50
  4. Step 4: Simplify right side
    721,271.10x = 397,121,484,598.43
  5. Step 5: Solve for x
    x = 397,121,484,598.43/721,271.10
  6. Step 6: Final answer
    x = 550,585.60

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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.