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Finding the Fourth Proportional to 287,247.02, 430,685.42 and 137,483.68

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Solution

The fourth proportional to 287,247.02, 430,685.42 and 137,483.68 is: 206,136.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,247.02 : 430,685.42 = 137,483.68 : x
  2. Step 2: Convert to fraction form
    287,247.02/430,685.42 = 137,483.68/x
  3. Step 3: Cross multiply
    287,247.02x = 430,685.42 × 137,483.68
  4. Step 4: Simplify right side
    287,247.02x = 59,212,216,463.95
  5. Step 5: Solve for x
    x = 59,212,216,463.95/287,247.02
  6. Step 6: Final answer
    x = 206,136.92

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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.