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Finding the Fourth Proportional to 885.48, 1,222.68 and 570.90

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Solution

The fourth proportional to 885.48, 1,222.68 and 570.90 is: 788.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.48 : 1,222.68 = 570.90 : x
  2. Step 2: Convert to fraction form
    885.48/1,222.68 = 570.90/x
  3. Step 3: Cross multiply
    885.48x = 1,222.68 × 570.90
  4. Step 4: Simplify right side
    885.48x = 698,028.01
  5. Step 5: Solve for x
    x = 698,028.01/885.48
  6. Step 6: Final answer
    x = 788.30

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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.