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Finding the Fourth Proportional to 885.06, 1,220.78 and 530.74

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Solution

The fourth proportional to 885.06, 1,220.78 and 530.74 is: 732.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.06 : 1,220.78 = 530.74 : x
  2. Step 2: Convert to fraction form
    885.06/1,220.78 = 530.74/x
  3. Step 3: Cross multiply
    885.06x = 1,220.78 × 530.74
  4. Step 4: Simplify right side
    885.06x = 647,916.78
  5. Step 5: Solve for x
    x = 647,916.78/885.06
  6. Step 6: Final answer
    x = 732.06

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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.