Home / 1,307.42-1,802.50-1,120.11

Finding the Fourth Proportional to 1,307.42, 1,802.50 and 1,120.11

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Solution

The fourth proportional to 1,307.42, 1,802.50 and 1,120.11 is: 1,544.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.42 : 1,802.50 = 1,120.11 : x
  2. Step 2: Convert to fraction form
    1,307.42/1,802.50 = 1,120.11/x
  3. Step 3: Cross multiply
    1,307.42x = 1,802.50 × 1,120.11
  4. Step 4: Simplify right side
    1,307.42x = 2,018,995.47
  5. Step 5: Solve for x
    x = 2,018,995.47/1,307.42
  6. Step 6: Final answer
    x = 1,544.26

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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.