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Finding the Fourth Proportional to 289,061.70, 398,905.68 and 160,009.10

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Solution

The fourth proportional to 289,061.70, 398,905.68 and 160,009.10 is: 220,812.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,061.70 : 398,905.68 = 160,009.10 : x
  2. Step 2: Convert to fraction form
    289,061.70/398,905.68 = 160,009.10/x
  3. Step 3: Cross multiply
    289,061.70x = 398,905.68 × 160,009.10
  4. Step 4: Simplify right side
    289,061.70x = 63,828,538,841.69
  5. Step 5: Solve for x
    x = 63,828,538,841.69/289,061.70
  6. Step 6: Final answer
    x = 220,812.85

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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.