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Finding the Fourth Proportional to 391,492.50, 540,260.19 and 212,644.50

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Solution

The fourth proportional to 391,492.50, 540,260.19 and 212,644.50 is: 293,449.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,492.50 : 540,260.19 = 212,644.50 : x
  2. Step 2: Convert to fraction form
    391,492.50/540,260.19 = 212,644.50/x
  3. Step 3: Cross multiply
    391,492.50x = 540,260.19 × 212,644.50
  4. Step 4: Simplify right side
    391,492.50x = 114,883,357,972.46
  5. Step 5: Solve for x
    x = 114,883,357,972.46/391,492.50
  6. Step 6: Final answer
    x = 293,449.70

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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.