Home / 670,743.92-925,321.27-398,657.20

Finding the Fourth Proportional to 670,743.92, 925,321.27 and 398,657.20

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Solution

The fourth proportional to 670,743.92, 925,321.27 and 398,657.20 is: 549,965.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,743.92 : 925,321.27 = 398,657.20 : x
  2. Step 2: Convert to fraction form
    670,743.92/925,321.27 = 398,657.20/x
  3. Step 3: Cross multiply
    670,743.92x = 925,321.27 × 398,657.20
  4. Step 4: Simplify right side
    670,743.92x = 368,885,986,598.64
  5. Step 5: Solve for x
    x = 368,885,986,598.64/670,743.92
  6. Step 6: Final answer
    x = 549,965.46

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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.