Home / 1,440.10-1,985.07-1,177.66

Finding the Fourth Proportional to 1,440.10, 1,985.07 and 1,177.66

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Solution

The fourth proportional to 1,440.10, 1,985.07 and 1,177.66 is: 1,623.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.10 : 1,985.07 = 1,177.66 : x
  2. Step 2: Convert to fraction form
    1,440.10/1,985.07 = 1,177.66/x
  3. Step 3: Cross multiply
    1,440.10x = 1,985.07 × 1,177.66
  4. Step 4: Simplify right side
    1,440.10x = 2,337,737.54
  5. Step 5: Solve for x
    x = 2,337,737.54/1,440.10
  6. Step 6: Final answer
    x = 1,623.32

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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.