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Finding the Fourth Proportional to 421,397.73, 631,801.30 and 155,123.70

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Solution

The fourth proportional to 421,397.73, 631,801.30 and 155,123.70 is: 232,576.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,397.73 : 631,801.30 = 155,123.70 : x
  2. Step 2: Convert to fraction form
    421,397.73/631,801.30 = 155,123.70/x
  3. Step 3: Cross multiply
    421,397.73x = 631,801.30 × 155,123.70
  4. Step 4: Simplify right side
    421,397.73x = 98,007,355,320.81
  5. Step 5: Solve for x
    x = 98,007,355,320.81/421,397.73
  6. Step 6: Final answer
    x = 232,576.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.