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Finding the Fourth Proportional to 884.21, 1,220.08 and 530.05

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Solution

The fourth proportional to 884.21, 1,220.08 and 530.05 is: 731.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.21 : 1,220.08 = 530.05 : x
  2. Step 2: Convert to fraction form
    884.21/1,220.08 = 530.05/x
  3. Step 3: Cross multiply
    884.21x = 1,220.08 × 530.05
  4. Step 4: Simplify right side
    884.21x = 646,703.40
  5. Step 5: Solve for x
    x = 646,703.40/884.21
  6. Step 6: Final answer
    x = 731.39

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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.