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Finding the Fourth Proportional to 1,127.55, 1,556.01 and 630.19

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Solution

The fourth proportional to 1,127.55, 1,556.01 and 630.19 is: 869.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.55 : 1,556.01 = 630.19 : x
  2. Step 2: Convert to fraction form
    1,127.55/1,556.01 = 630.19/x
  3. Step 3: Cross multiply
    1,127.55x = 1,556.01 × 630.19
  4. Step 4: Simplify right side
    1,127.55x = 980,581.94
  5. Step 5: Solve for x
    x = 980,581.94/1,127.55
  6. Step 6: Final answer
    x = 869.66

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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.