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Finding the Fourth Proportional to 541.51, 747.51 and 320.47

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Solution

The fourth proportional to 541.51, 747.51 and 320.47 is: 442.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    541.51 : 747.51 = 320.47 : x
  2. Step 2: Convert to fraction form
    541.51/747.51 = 320.47/x
  3. Step 3: Cross multiply
    541.51x = 747.51 × 320.47
  4. Step 4: Simplify right side
    541.51x = 239,550.79
  5. Step 5: Solve for x
    x = 239,550.79/541.51
  6. Step 6: Final answer
    x = 442.38

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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.