Home / 3,520.64-5,280.56-923.78

Finding the Fourth Proportional to 3,520.64, 5,280.56 and 923.78

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Solution

The fourth proportional to 3,520.64, 5,280.56 and 923.78 is: 1,385.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,520.64 : 5,280.56 = 923.78 : x
  2. Step 2: Convert to fraction form
    3,520.64/5,280.56 = 923.78/x
  3. Step 3: Cross multiply
    3,520.64x = 5,280.56 × 923.78
  4. Step 4: Simplify right side
    3,520.64x = 4,878,075.72
  5. Step 5: Solve for x
    x = 4,878,075.72/3,520.64
  6. Step 6: Final answer
    x = 1,385.57

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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.