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Finding the Fourth Proportional to 874.37, 1,312.02 and 354.65

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Solution

The fourth proportional to 874.37, 1,312.02 and 354.65 is: 532.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.37 : 1,312.02 = 354.65 : x
  2. Step 2: Convert to fraction form
    874.37/1,312.02 = 354.65/x
  3. Step 3: Cross multiply
    874.37x = 1,312.02 × 354.65
  4. Step 4: Simplify right side
    874.37x = 465,307.89
  5. Step 5: Solve for x
    x = 465,307.89/874.37
  6. Step 6: Final answer
    x = 532.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.