Home / 1,400.10-1,931.28-1,007.66

Finding the Fourth Proportional to 1,400.10, 1,931.28 and 1,007.66

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Solution

The fourth proportional to 1,400.10, 1,931.28 and 1,007.66 is: 1,389.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.10 : 1,931.28 = 1,007.66 : x
  2. Step 2: Convert to fraction form
    1,400.10/1,931.28 = 1,007.66/x
  3. Step 3: Cross multiply
    1,400.10x = 1,931.28 × 1,007.66
  4. Step 4: Simplify right side
    1,400.10x = 1,946,063.95
  5. Step 5: Solve for x
    x = 1,946,063.95/1,400.10
  6. Step 6: Final answer
    x = 1,389.95

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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.