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Finding the Fourth Proportional to 1,014.34, 1,400.38 and 665.63

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Solution

The fourth proportional to 1,014.34, 1,400.38 and 665.63 is: 918.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.34 : 1,400.38 = 665.63 : x
  2. Step 2: Convert to fraction form
    1,014.34/1,400.38 = 665.63/x
  3. Step 3: Cross multiply
    1,014.34x = 1,400.38 × 665.63
  4. Step 4: Simplify right side
    1,014.34x = 932,136.78
  5. Step 5: Solve for x
    x = 932,136.78/1,014.34
  6. Step 6: Final answer
    x = 918.96

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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.