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Finding the Fourth Proportional to 1,050.78, 1,575.29 and 392.29

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Solution

The fourth proportional to 1,050.78, 1,575.29 and 392.29 is: 588.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,050.78 : 1,575.29 = 392.29 : x
  2. Step 2: Convert to fraction form
    1,050.78/1,575.29 = 392.29/x
  3. Step 3: Cross multiply
    1,050.78x = 1,575.29 × 392.29
  4. Step 4: Simplify right side
    1,050.78x = 617,970.51
  5. Step 5: Solve for x
    x = 617,970.51/1,050.78
  6. Step 6: Final answer
    x = 588.11

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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.