Home / 1,555.10-2,145.80-925.42

Finding the Fourth Proportional to 1,555.10, 2,145.80 and 925.42

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Solution

The fourth proportional to 1,555.10, 2,145.80 and 925.42 is: 1,276.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.10 : 2,145.80 = 925.42 : x
  2. Step 2: Convert to fraction form
    1,555.10/2,145.80 = 925.42/x
  3. Step 3: Cross multiply
    1,555.10x = 2,145.80 × 925.42
  4. Step 4: Simplify right side
    1,555.10x = 1,985,763.19
  5. Step 5: Solve for x
    x = 1,985,763.19/1,555.10
  6. Step 6: Final answer
    x = 1,276.93

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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.