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Finding the Fourth Proportional to 630.80, 945.40 and 558.80

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Solution

The fourth proportional to 630.80, 945.40 and 558.80 is: 837.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.80 : 945.40 = 558.80 : x
  2. Step 2: Convert to fraction form
    630.80/945.40 = 558.80/x
  3. Step 3: Cross multiply
    630.80x = 945.40 × 558.80
  4. Step 4: Simplify right side
    630.80x = 528,289.52
  5. Step 5: Solve for x
    x = 528,289.52/630.80
  6. Step 6: Final answer
    x = 837.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.