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Finding the Fourth Proportional to 565.68, 780.60 and 355.89

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Solution

The fourth proportional to 565.68, 780.60 and 355.89 is: 491.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    565.68 : 780.60 = 355.89 : x
  2. Step 2: Convert to fraction form
    565.68/780.60 = 355.89/x
  3. Step 3: Cross multiply
    565.68x = 780.60 × 355.89
  4. Step 4: Simplify right side
    565.68x = 277,807.73
  5. Step 5: Solve for x
    x = 277,807.73/565.68
  6. Step 6: Final answer
    x = 491.10

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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.