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Finding the Fourth Proportional to 285,726.64, 428,547.84 and 75,379.36

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Solution

The fourth proportional to 285,726.64, 428,547.84 and 75,379.36 is: 113,057.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,726.64 : 428,547.84 = 75,379.36 : x
  2. Step 2: Convert to fraction form
    285,726.64/428,547.84 = 75,379.36/x
  3. Step 3: Cross multiply
    285,726.64x = 428,547.84 × 75,379.36
  4. Step 4: Simplify right side
    285,726.64x = 32,303,661,908.58
  5. Step 5: Solve for x
    x = 32,303,661,908.58/285,726.64
  6. Step 6: Final answer
    x = 113,057.93

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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.