Home / 1,557.63-2,120.58-1,531.71

Finding the Fourth Proportional to 1,557.63, 2,120.58 and 1,531.71

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Solution

The fourth proportional to 1,557.63, 2,120.58 and 1,531.71 is: 2,085.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.63 : 2,120.58 = 1,531.71 : x
  2. Step 2: Convert to fraction form
    1,557.63/2,120.58 = 1,531.71/x
  3. Step 3: Cross multiply
    1,557.63x = 2,120.58 × 1,531.71
  4. Step 4: Simplify right side
    1,557.63x = 3,248,113.59
  5. Step 5: Solve for x
    x = 3,248,113.59/1,557.63
  6. Step 6: Final answer
    x = 2,085.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.