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Finding the Fourth Proportional to 885.51, 1,328.77 and 365.90

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Solution

The fourth proportional to 885.51, 1,328.77 and 365.90 is: 549.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.51 : 1,328.77 = 365.90 : x
  2. Step 2: Convert to fraction form
    885.51/1,328.77 = 365.90/x
  3. Step 3: Cross multiply
    885.51x = 1,328.77 × 365.90
  4. Step 4: Simplify right side
    885.51x = 486,188.47
  5. Step 5: Solve for x
    x = 486,188.47/885.51
  6. Step 6: Final answer
    x = 549.05

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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.