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Finding the Fourth Proportional to 289,678.80, 399,772.08 and 162,395.04

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Solution

The fourth proportional to 289,678.80, 399,772.08 and 162,395.04 is: 224,113.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,678.80 : 399,772.08 = 162,395.04 : x
  2. Step 2: Convert to fraction form
    289,678.80/399,772.08 = 162,395.04/x
  3. Step 3: Cross multiply
    289,678.80x = 399,772.08 × 162,395.04
  4. Step 4: Simplify right side
    289,678.80x = 64,921,002,922.48
  5. Step 5: Solve for x
    x = 64,921,002,922.48/289,678.80
  6. Step 6: Final answer
    x = 224,113.75

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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.