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Finding the Fourth Proportional to 920.48, 1,270.12 and 589.20

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Solution

The fourth proportional to 920.48, 1,270.12 and 589.20 is: 813.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.48 : 1,270.12 = 589.20 : x
  2. Step 2: Convert to fraction form
    920.48/1,270.12 = 589.20/x
  3. Step 3: Cross multiply
    920.48x = 1,270.12 × 589.20
  4. Step 4: Simplify right side
    920.48x = 748,354.70
  5. Step 5: Solve for x
    x = 748,354.70/920.48
  6. Step 6: Final answer
    x = 813.00

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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.