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Finding the Fourth Proportional to 916.84, 1,262.82 and 693.64

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Solution

The fourth proportional to 916.84, 1,262.82 and 693.64 is: 955.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.84 : 1,262.82 = 693.64 : x
  2. Step 2: Convert to fraction form
    916.84/1,262.82 = 693.64/x
  3. Step 3: Cross multiply
    916.84x = 1,262.82 × 693.64
  4. Step 4: Simplify right side
    916.84x = 875,942.46
  5. Step 5: Solve for x
    x = 875,942.46/916.84
  6. Step 6: Final answer
    x = 955.39

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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.