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Finding the Fourth Proportional to 848.20, 1,272.06 and 300.40

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Solution

The fourth proportional to 848.20, 1,272.06 and 300.40 is: 450.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.20 : 1,272.06 = 300.40 : x
  2. Step 2: Convert to fraction form
    848.20/1,272.06 = 300.40/x
  3. Step 3: Cross multiply
    848.20x = 1,272.06 × 300.40
  4. Step 4: Simplify right side
    848.20x = 382,126.82
  5. Step 5: Solve for x
    x = 382,126.82/848.20
  6. Step 6: Final answer
    x = 450.52

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1.5x scale

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.