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Finding the Fourth Proportional to 848.74, 1,271.95 and 328.18

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Solution

The fourth proportional to 848.74, 1,271.95 and 328.18 is: 491.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.74 : 1,271.95 = 328.18 : x
  2. Step 2: Convert to fraction form
    848.74/1,271.95 = 328.18/x
  3. Step 3: Cross multiply
    848.74x = 1,271.95 × 328.18
  4. Step 4: Simplify right side
    848.74x = 417,428.55
  5. Step 5: Solve for x
    x = 417,428.55/848.74
  6. Step 6: Final answer
    x = 491.82

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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.