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Finding the Fourth Proportional to 423.02, 583.78 and 265.65

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Solution

The fourth proportional to 423.02, 583.78 and 265.65 is: 366.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.02 : 583.78 = 265.65 : x
  2. Step 2: Convert to fraction form
    423.02/583.78 = 265.65/x
  3. Step 3: Cross multiply
    423.02x = 583.78 × 265.65
  4. Step 4: Simplify right side
    423.02x = 155,081.16
  5. Step 5: Solve for x
    x = 155,081.16/423.02
  6. Step 6: Final answer
    x = 366.60

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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.