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Finding the Fourth Proportional to 670,739.76, 925,315.53 and 398,653.04

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Solution

The fourth proportional to 670,739.76, 925,315.53 and 398,653.04 is: 549,959.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,739.76 : 925,315.53 = 398,653.04 : x
  2. Step 2: Convert to fraction form
    670,739.76/925,315.53 = 398,653.04/x
  3. Step 3: Cross multiply
    670,739.76x = 925,315.53 × 398,653.04
  4. Step 4: Simplify right side
    670,739.76x = 368,879,844,367.13
  5. Step 5: Solve for x
    x = 368,879,844,367.13/670,739.76
  6. Step 6: Final answer
    x = 549,959.71

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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.