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Finding the Fourth Proportional to 582.36, 803.66 and 320.40

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Solution

The fourth proportional to 582.36, 803.66 and 320.40 is: 442.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    582.36 : 803.66 = 320.40 : x
  2. Step 2: Convert to fraction form
    582.36/803.66 = 320.40/x
  3. Step 3: Cross multiply
    582.36x = 803.66 × 320.40
  4. Step 4: Simplify right side
    582.36x = 257,492.66
  5. Step 5: Solve for x
    x = 257,492.66/582.36
  6. Step 6: Final answer
    x = 442.15

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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.