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Finding the Fourth Proportional to 287,891.20, 431,901.60 and 169,501.60

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Solution

The fourth proportional to 287,891.20, 431,901.60 and 169,501.60 is: 254,290.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,891.20 : 431,901.60 = 169,501.60 : x
  2. Step 2: Convert to fraction form
    287,891.20/431,901.60 = 169,501.60/x
  3. Step 3: Cross multiply
    287,891.20x = 431,901.60 × 169,501.60
  4. Step 4: Simplify right side
    287,891.20x = 73,208,012,242.56
  5. Step 5: Solve for x
    x = 73,208,012,242.56/287,891.20
  6. Step 6: Final answer
    x = 254,290.55

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1.5x scale

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.