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Finding the Fourth Proportional to 671,066.15, 925,718.38 and 398,940.47

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Solution

The fourth proportional to 671,066.15, 925,718.38 and 398,940.47 is: 550,328.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,066.15 : 925,718.38 = 398,940.47 : x
  2. Step 2: Convert to fraction form
    671,066.15/925,718.38 = 398,940.47/x
  3. Step 3: Cross multiply
    671,066.15x = 925,718.38 × 398,940.47
  4. Step 4: Simplify right side
    671,066.15x = 369,306,524,572.36
  5. Step 5: Solve for x
    x = 369,306,524,572.36/671,066.15
  6. Step 6: Final answer
    x = 550,328.05

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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.