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Finding the Fourth Proportional to 289,437.84, 399,440.16 and 162,131.76

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Solution

The fourth proportional to 289,437.84, 399,440.16 and 162,131.76 is: 223,750.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,437.84 : 399,440.16 = 162,131.76 : x
  2. Step 2: Convert to fraction form
    289,437.84/399,440.16 = 162,131.76/x
  3. Step 3: Cross multiply
    289,437.84x = 399,440.16 × 162,131.76
  4. Step 4: Simplify right side
    289,437.84x = 64,761,936,155.48
  5. Step 5: Solve for x
    x = 64,761,936,155.48/289,437.84
  6. Step 6: Final answer
    x = 223,750.76

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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.