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Finding the Fourth Proportional to 1,307.98, 1,805.70 and 866.92

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Solution

The fourth proportional to 1,307.98, 1,805.70 and 866.92 is: 1,196.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.98 : 1,805.70 = 866.92 : x
  2. Step 2: Convert to fraction form
    1,307.98/1,805.70 = 866.92/x
  3. Step 3: Cross multiply
    1,307.98x = 1,805.70 × 866.92
  4. Step 4: Simplify right side
    1,307.98x = 1,565,397.44
  5. Step 5: Solve for x
    x = 1,565,397.44/1,307.98
  6. Step 6: Final answer
    x = 1,196.81

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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.