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Finding the Fourth Proportional to 285,756.18, 428,657.64 and 143,528.32

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Solution

The fourth proportional to 285,756.18, 428,657.64 and 143,528.32 is: 215,304.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,756.18 : 428,657.64 = 143,528.32 : x
  2. Step 2: Convert to fraction form
    285,756.18/428,657.64 = 143,528.32/x
  3. Step 3: Cross multiply
    285,756.18x = 428,657.64 × 143,528.32
  4. Step 4: Simplify right side
    285,756.18x = 61,524,510,924.36
  5. Step 5: Solve for x
    x = 61,524,510,924.36/285,756.18
  6. Step 6: Final answer
    x = 215,304.22

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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.