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Finding the Fourth Proportional to 283,643.70, 391,528.56 and 253,376.46

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Solution

The fourth proportional to 283,643.70, 391,528.56 and 253,376.46 is: 349,749.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,643.70 : 391,528.56 = 253,376.46 : x
  2. Step 2: Convert to fraction form
    283,643.70/391,528.56 = 253,376.46/x
  3. Step 3: Cross multiply
    283,643.70x = 391,528.56 × 253,376.46
  4. Step 4: Simplify right side
    283,643.70x = 99,204,120,521.70
  5. Step 5: Solve for x
    x = 99,204,120,521.70/283,643.70
  6. Step 6: Final answer
    x = 349,749.07

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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.