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Finding the Fourth Proportional to 287,599.60, 431,399.40 and 74,367.10

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Solution

The fourth proportional to 287,599.60, 431,399.40 and 74,367.10 is: 111,550.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,599.60 : 431,399.40 = 74,367.10 : x
  2. Step 2: Convert to fraction form
    287,599.60/431,399.40 = 74,367.10/x
  3. Step 3: Cross multiply
    287,599.60x = 431,399.40 × 74,367.10
  4. Step 4: Simplify right side
    287,599.60x = 32,081,922,319.74
  5. Step 5: Solve for x
    x = 32,081,922,319.74/287,599.60
  6. Step 6: Final answer
    x = 111,550.65

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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.