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Finding the Fourth Proportional to 287,937.88, 397,140.06 and 211,432.96

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Solution

The fourth proportional to 287,937.88, 397,140.06 and 211,432.96 is: 291,620.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,937.88 : 397,140.06 = 211,432.96 : x
  2. Step 2: Convert to fraction form
    287,937.88/397,140.06 = 211,432.96/x
  3. Step 3: Cross multiply
    287,937.88x = 397,140.06 × 211,432.96
  4. Step 4: Simplify right side
    287,937.88x = 83,968,498,420.38
  5. Step 5: Solve for x
    x = 83,968,498,420.38/287,937.88
  6. Step 6: Final answer
    x = 291,620.19

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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.