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Finding the Fourth Proportional to 985.20, 1,477.80 and 795.12

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Solution

The fourth proportional to 985.20, 1,477.80 and 795.12 is: 1,192.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    985.20 : 1,477.80 = 795.12 : x
  2. Step 2: Convert to fraction form
    985.20/1,477.80 = 795.12/x
  3. Step 3: Cross multiply
    985.20x = 1,477.80 × 795.12
  4. Step 4: Simplify right side
    985.20x = 1,175,028.34
  5. Step 5: Solve for x
    x = 1,175,028.34/985.20
  6. Step 6: Final answer
    x = 1,192.68

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1.5x scale

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.