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Finding the Fourth Proportional to 1,590.42, 2,385.58 and 436.16

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Solution

The fourth proportional to 1,590.42, 2,385.58 and 436.16 is: 654.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,590.42 : 2,385.58 = 436.16 : x
  2. Step 2: Convert to fraction form
    1,590.42/2,385.58 = 436.16/x
  3. Step 3: Cross multiply
    1,590.42x = 2,385.58 × 436.16
  4. Step 4: Simplify right side
    1,590.42x = 1,040,494.57
  5. Step 5: Solve for x
    x = 1,040,494.57/1,590.42
  6. Step 6: Final answer
    x = 654.23

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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.