Home / 3,590.80-5,386.20-1,125.40

Finding the Fourth Proportional to 3,590.80, 5,386.20 and 1,125.40

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Solution

The fourth proportional to 3,590.80, 5,386.20 and 1,125.40 is: 1,688.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,590.80 : 5,386.20 = 1,125.40 : x
  2. Step 2: Convert to fraction form
    3,590.80/5,386.20 = 1,125.40/x
  3. Step 3: Cross multiply
    3,590.80x = 5,386.20 × 1,125.40
  4. Step 4: Simplify right side
    3,590.80x = 6,061,629.48
  5. Step 5: Solve for x
    x = 6,061,629.48/3,590.80
  6. Step 6: Final answer
    x = 1,688.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.