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Finding the Fourth Proportional to 740.02, 1,020.92 and 456.34

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Solution

The fourth proportional to 740.02, 1,020.92 and 456.34 is: 629.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.02 : 1,020.92 = 456.34 : x
  2. Step 2: Convert to fraction form
    740.02/1,020.92 = 456.34/x
  3. Step 3: Cross multiply
    740.02x = 1,020.92 × 456.34
  4. Step 4: Simplify right side
    740.02x = 465,886.63
  5. Step 5: Solve for x
    x = 465,886.63/740.02
  6. Step 6: Final answer
    x = 629.56

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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.