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Finding the Fourth Proportional to 670,739.67, 925,315.40 and 398,652.93

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Solution

The fourth proportional to 670,739.67, 925,315.40 and 398,652.93 is: 549,959.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,739.67 : 925,315.40 = 398,652.93 : x
  2. Step 2: Convert to fraction form
    670,739.67/925,315.40 = 398,652.93/x
  3. Step 3: Cross multiply
    670,739.67x = 925,315.40 × 398,652.93
  4. Step 4: Simplify right side
    670,739.67x = 368,879,696,380.75
  5. Step 5: Solve for x
    x = 368,879,696,380.75/670,739.67
  6. Step 6: Final answer
    x = 549,959.56

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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.