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Finding the Fourth Proportional to 424,980.70, 637,420.61 and 140,671.91

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Solution

The fourth proportional to 424,980.70, 637,420.61 and 140,671.91 is: 210,991.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,980.70 : 637,420.61 = 140,671.91 : x
  2. Step 2: Convert to fraction form
    424,980.70/637,420.61 = 140,671.91/x
  3. Step 3: Cross multiply
    424,980.70x = 637,420.61 × 140,671.91
  4. Step 4: Simplify right side
    424,980.70x = 89,667,176,627.30
  5. Step 5: Solve for x
    x = 89,667,176,627.30/424,980.70
  6. Step 6: Final answer
    x = 210,991.17

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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.