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Finding the Fourth Proportional to 290,071.61, 435,107.52 and 90,408.07

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Solution

The fourth proportional to 290,071.61, 435,107.52 and 90,408.07 is: 135,612.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,071.61 : 435,107.52 = 90,408.07 : x
  2. Step 2: Convert to fraction form
    290,071.61/435,107.52 = 90,408.07/x
  3. Step 3: Cross multiply
    290,071.61x = 435,107.52 × 90,408.07
  4. Step 4: Simplify right side
    290,071.61x = 39,337,233,147.58
  5. Step 5: Solve for x
    x = 39,337,233,147.58/290,071.61
  6. Step 6: Final answer
    x = 135,612.15

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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.