Home / 1,252.15-1,878.08-430.29

Finding the Fourth Proportional to 1,252.15, 1,878.08 and 430.29

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Solution

The fourth proportional to 1,252.15, 1,878.08 and 430.29 is: 645.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,252.15 : 1,878.08 = 430.29 : x
  2. Step 2: Convert to fraction form
    1,252.15/1,878.08 = 430.29/x
  3. Step 3: Cross multiply
    1,252.15x = 1,878.08 × 430.29
  4. Step 4: Simplify right side
    1,252.15x = 808,116.89
  5. Step 5: Solve for x
    x = 808,116.89/1,252.15
  6. Step 6: Final answer
    x = 645.38

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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.