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Finding the Fourth Proportional to 582.56, 803.87 and 320.56

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Solution

The fourth proportional to 582.56, 803.87 and 320.56 is: 442.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    582.56 : 803.87 = 320.56 : x
  2. Step 2: Convert to fraction form
    582.56/803.87 = 320.56/x
  3. Step 3: Cross multiply
    582.56x = 803.87 × 320.56
  4. Step 4: Simplify right side
    582.56x = 257,688.57
  5. Step 5: Solve for x
    x = 257,688.57/582.56
  6. Step 6: Final answer
    x = 442.34

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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.