Home / 1,291.76-1,938.19-624.32

Finding the Fourth Proportional to 1,291.76, 1,938.19 and 624.32

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Solution

The fourth proportional to 1,291.76, 1,938.19 and 624.32 is: 936.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291.76 : 1,938.19 = 624.32 : x
  2. Step 2: Convert to fraction form
    1,291.76/1,938.19 = 624.32/x
  3. Step 3: Cross multiply
    1,291.76x = 1,938.19 × 624.32
  4. Step 4: Simplify right side
    1,291.76x = 1,210,047.66
  5. Step 5: Solve for x
    x = 1,210,047.66/1,291.76
  6. Step 6: Final answer
    x = 936.74

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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.