Home / 1,136.40-1,702.08-918.96

Finding the Fourth Proportional to 1,136.40, 1,702.08 and 918.96

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Solution

The fourth proportional to 1,136.40, 1,702.08 and 918.96 is: 1,376.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,136.40 : 1,702.08 = 918.96 : x
  2. Step 2: Convert to fraction form
    1,136.40/1,702.08 = 918.96/x
  3. Step 3: Cross multiply
    1,136.40x = 1,702.08 × 918.96
  4. Step 4: Simplify right side
    1,136.40x = 1,564,143.44
  5. Step 5: Solve for x
    x = 1,564,143.44/1,136.40
  6. Step 6: Final answer
    x = 1,376.40

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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.