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Finding the Fourth Proportional to 707,990.60, 1,062,590.70 and 287,568.20

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Solution

The fourth proportional to 707,990.60, 1,062,590.70 and 287,568.20 is: 431,597.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,990.60 : 1,062,590.70 = 287,568.20 : x
  2. Step 2: Convert to fraction form
    707,990.60/1,062,590.70 = 287,568.20/x
  3. Step 3: Cross multiply
    707,990.60x = 1,062,590.70 × 287,568.20
  4. Step 4: Simplify right side
    707,990.60x = 305,567,294,935.74
  5. Step 5: Solve for x
    x = 305,567,294,935.74/707,990.60
  6. Step 6: Final answer
    x = 431,597.95

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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.