Home / 1,277.19-1,915.80-618.93

Finding the Fourth Proportional to 1,277.19, 1,915.80 and 618.93

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Solution

The fourth proportional to 1,277.19, 1,915.80 and 618.93 is: 928.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.19 : 1,915.80 = 618.93 : x
  2. Step 2: Convert to fraction form
    1,277.19/1,915.80 = 618.93/x
  3. Step 3: Cross multiply
    1,277.19x = 1,915.80 × 618.93
  4. Step 4: Simplify right side
    1,277.19x = 1,185,746.09
  5. Step 5: Solve for x
    x = 1,185,746.09/1,277.19
  6. Step 6: Final answer
    x = 928.40

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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.