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Finding the Fourth Proportional to 883.64, 1,219.68 and 647.72

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Solution

The fourth proportional to 883.64, 1,219.68 and 647.72 is: 894.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.64 : 1,219.68 = 647.72 : x
  2. Step 2: Convert to fraction form
    883.64/1,219.68 = 647.72/x
  3. Step 3: Cross multiply
    883.64x = 1,219.68 × 647.72
  4. Step 4: Simplify right side
    883.64x = 790,011.13
  5. Step 5: Solve for x
    x = 790,011.13/883.64
  6. Step 6: Final answer
    x = 894.04

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1.5x scale

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.