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Finding the Fourth Proportional to 1,274.39, 1,758.68 and 714.98

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Solution

The fourth proportional to 1,274.39, 1,758.68 and 714.98 is: 986.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274.39 : 1,758.68 = 714.98 : x
  2. Step 2: Convert to fraction form
    1,274.39/1,758.68 = 714.98/x
  3. Step 3: Cross multiply
    1,274.39x = 1,758.68 × 714.98
  4. Step 4: Simplify right side
    1,274.39x = 1,257,417.45
  5. Step 5: Solve for x
    x = 1,257,417.45/1,274.39
  6. Step 6: Final answer
    x = 986.68

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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.