Home / 1,488.80-2,053.32-1,389.44

Finding the Fourth Proportional to 1,488.80, 2,053.32 and 1,389.44

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Solution

The fourth proportional to 1,488.80, 2,053.32 and 1,389.44 is: 1,916.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,488.80 : 2,053.32 = 1,389.44 : x
  2. Step 2: Convert to fraction form
    1,488.80/2,053.32 = 1,389.44/x
  3. Step 3: Cross multiply
    1,488.80x = 2,053.32 × 1,389.44
  4. Step 4: Simplify right side
    1,488.80x = 2,852,964.94
  5. Step 5: Solve for x
    x = 2,852,964.94/1,488.80
  6. Step 6: Final answer
    x = 1,916.28

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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.