Home / 1,929.40-2,662.56-1,045.20

Finding the Fourth Proportional to 1,929.40, 2,662.56 and 1,045.20

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Solution

The fourth proportional to 1,929.40, 2,662.56 and 1,045.20 is: 1,442.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,929.40 : 2,662.56 = 1,045.20 : x
  2. Step 2: Convert to fraction form
    1,929.40/2,662.56 = 1,045.20/x
  3. Step 3: Cross multiply
    1,929.40x = 2,662.56 × 1,045.20
  4. Step 4: Simplify right side
    1,929.40x = 2,782,907.71
  5. Step 5: Solve for x
    x = 2,782,907.71/1,929.40
  6. Step 6: Final answer
    x = 1,442.37

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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.