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Finding the Fourth Proportional to 391,059.13, 539,661.59 and 212,211.13

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Solution

The fourth proportional to 391,059.13, 539,661.59 and 212,211.13 is: 292,851.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,059.13 : 539,661.59 = 212,211.13 : x
  2. Step 2: Convert to fraction form
    391,059.13/539,661.59 = 212,211.13/x
  3. Step 3: Cross multiply
    391,059.13x = 539,661.59 × 212,211.13
  4. Step 4: Simplify right side
    391,059.13x = 114,522,195,831.50
  5. Step 5: Solve for x
    x = 114,522,195,831.50/391,059.13
  6. Step 6: Final answer
    x = 292,851.35

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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.