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Finding the Fourth Proportional to 1,590.75, 2,386.29 and 436.50

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Solution

The fourth proportional to 1,590.75, 2,386.29 and 436.50 is: 654.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,590.75 : 2,386.29 = 436.50 : x
  2. Step 2: Convert to fraction form
    1,590.75/2,386.29 = 436.50/x
  3. Step 3: Cross multiply
    1,590.75x = 2,386.29 × 436.50
  4. Step 4: Simplify right side
    1,590.75x = 1,041,615.59
  5. Step 5: Solve for x
    x = 1,041,615.59/1,590.75
  6. Step 6: Final answer
    x = 654.80

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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.