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Finding the Fourth Proportional to 287,697.96, 397,024.11 and 156,874.65

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Solution

The fourth proportional to 287,697.96, 397,024.11 and 156,874.65 is: 216,487.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,697.96 : 397,024.11 = 156,874.65 : x
  2. Step 2: Convert to fraction form
    287,697.96/397,024.11 = 156,874.65/x
  3. Step 3: Cross multiply
    287,697.96x = 397,024.11 × 156,874.65
  4. Step 4: Simplify right side
    287,697.96x = 62,283,018,297.81
  5. Step 5: Solve for x
    x = 62,283,018,297.81/287,697.96
  6. Step 6: Final answer
    x = 216,487.52

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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.