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Finding the Fourth Proportional to 290,466.90, 435,700.71 and 90,788.31

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Solution

The fourth proportional to 290,466.90, 435,700.71 and 90,788.31 is: 136,182.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,466.90 : 435,700.71 = 90,788.31 : x
  2. Step 2: Convert to fraction form
    290,466.90/435,700.71 = 90,788.31/x
  3. Step 3: Cross multiply
    290,466.90x = 435,700.71 × 90,788.31
  4. Step 4: Simplify right side
    290,466.90x = 39,556,531,126.70
  5. Step 5: Solve for x
    x = 39,556,531,126.70/290,466.90
  6. Step 6: Final answer
    x = 136,182.58

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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.