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Finding the Fourth Proportional to 1,366.98, 1,885.79 and 807.07

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Solution

The fourth proportional to 1,366.98, 1,885.79 and 807.07 is: 1,113.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,366.98 : 1,885.79 = 807.07 : x
  2. Step 2: Convert to fraction form
    1,366.98/1,885.79 = 807.07/x
  3. Step 3: Cross multiply
    1,366.98x = 1,885.79 × 807.07
  4. Step 4: Simplify right side
    1,366.98x = 1,521,961.84
  5. Step 5: Solve for x
    x = 1,521,961.84/1,366.98
  6. Step 6: Final answer
    x = 1,113.38

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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.