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Finding the Fourth Proportional to 790.19, 1,184.60 and 424.55

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Solution

The fourth proportional to 790.19, 1,184.60 and 424.55 is: 636.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.19 : 1,184.60 = 424.55 : x
  2. Step 2: Convert to fraction form
    790.19/1,184.60 = 424.55/x
  3. Step 3: Cross multiply
    790.19x = 1,184.60 × 424.55
  4. Step 4: Simplify right side
    790.19x = 502,916.85
  5. Step 5: Solve for x
    x = 502,916.85/790.19
  6. Step 6: Final answer
    x = 636.45

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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.