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Finding the Fourth Proportional to 391,068.64, 539,674.71 and 212,220.64

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Solution

The fourth proportional to 391,068.64, 539,674.71 and 212,220.64 is: 292,864.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,068.64 : 539,674.71 = 212,220.64 : x
  2. Step 2: Convert to fraction form
    391,068.64/539,674.71 = 212,220.64/x
  3. Step 3: Cross multiply
    391,068.64x = 539,674.71 × 212,220.64
  4. Step 4: Simplify right side
    391,068.64x = 114,530,112,348.01
  5. Step 5: Solve for x
    x = 114,530,112,348.01/391,068.64
  6. Step 6: Final answer
    x = 292,864.48

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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.