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Finding the Fourth Proportional to 1,254.34, 1,730.85 and 756.91

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Solution

The fourth proportional to 1,254.34, 1,730.85 and 756.91 is: 1,044.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,254.34 : 1,730.85 = 756.91 : x
  2. Step 2: Convert to fraction form
    1,254.34/1,730.85 = 756.91/x
  3. Step 3: Cross multiply
    1,254.34x = 1,730.85 × 756.91
  4. Step 4: Simplify right side
    1,254.34x = 1,310,089.02
  5. Step 5: Solve for x
    x = 1,310,089.02/1,254.34
  6. Step 6: Final answer
    x = 1,044.45

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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.