Home / 1,590.10-2,385.15-435.85

Finding the Fourth Proportional to 1,590.10, 2,385.15 and 435.85

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Solution

The fourth proportional to 1,590.10, 2,385.15 and 435.85 is: 653.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,590.10 : 2,385.15 = 435.85 : x
  2. Step 2: Convert to fraction form
    1,590.10/2,385.15 = 435.85/x
  3. Step 3: Cross multiply
    1,590.10x = 2,385.15 × 435.85
  4. Step 4: Simplify right side
    1,590.10x = 1,039,567.63
  5. Step 5: Solve for x
    x = 1,039,567.63/1,590.10
  6. Step 6: Final answer
    x = 653.78

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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.