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Finding the Fourth Proportional to 945.51, 1,302.98 and 630.42

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Solution

The fourth proportional to 945.51, 1,302.98 and 630.42 is: 868.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.51 : 1,302.98 = 630.42 : x
  2. Step 2: Convert to fraction form
    945.51/1,302.98 = 630.42/x
  3. Step 3: Cross multiply
    945.51x = 1,302.98 × 630.42
  4. Step 4: Simplify right side
    945.51x = 821,424.65
  5. Step 5: Solve for x
    x = 821,424.65/945.51
  6. Step 6: Final answer
    x = 868.76

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Double scale
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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.