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Finding the Fourth Proportional to 1,547.75, 2,136.02 and 918.41

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Solution

The fourth proportional to 1,547.75, 2,136.02 and 918.41 is: 1,267.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,547.75 : 2,136.02 = 918.41 : x
  2. Step 2: Convert to fraction form
    1,547.75/2,136.02 = 918.41/x
  3. Step 3: Cross multiply
    1,547.75x = 2,136.02 × 918.41
  4. Step 4: Simplify right side
    1,547.75x = 1,961,742.13
  5. Step 5: Solve for x
    x = 1,961,742.13/1,547.75
  6. Step 6: Final answer
    x = 1,267.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.