Home / 287,820.20-431,147.10-163,015.40

Finding the Fourth Proportional to 287,820.20, 431,147.10 and 163,015.40

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Solution

The fourth proportional to 287,820.20, 431,147.10 and 163,015.40 is: 244,192.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,820.20 : 431,147.10 = 163,015.40 : x
  2. Step 2: Convert to fraction form
    287,820.20/431,147.10 = 163,015.40/x
  3. Step 3: Cross multiply
    287,820.20x = 431,147.10 × 163,015.40
  4. Step 4: Simplify right side
    287,820.20x = 70,283,616,965.34
  5. Step 5: Solve for x
    x = 70,283,616,965.34/287,820.20
  6. Step 6: Final answer
    x = 244,192.79

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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.