Home / 1,252.18-1,878.40-430.35

Finding the Fourth Proportional to 1,252.18, 1,878.40 and 430.35

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Solution

The fourth proportional to 1,252.18, 1,878.40 and 430.35 is: 645.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,252.18 : 1,878.40 = 430.35 : x
  2. Step 2: Convert to fraction form
    1,252.18/1,878.40 = 430.35/x
  3. Step 3: Cross multiply
    1,252.18x = 1,878.40 × 430.35
  4. Step 4: Simplify right side
    1,252.18x = 808,369.44
  5. Step 5: Solve for x
    x = 808,369.44/1,252.18
  6. Step 6: Final answer
    x = 645.57

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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.