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Finding the Fourth Proportional to 290,316.60, 435,474.94 and 90,654.10

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Solution

The fourth proportional to 290,316.60, 435,474.94 and 90,654.10 is: 135,981.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,316.60 : 435,474.94 = 90,654.10 : x
  2. Step 2: Convert to fraction form
    290,316.60/435,474.94 = 90,654.10/x
  3. Step 3: Cross multiply
    290,316.60x = 435,474.94 × 90,654.10
  4. Step 4: Simplify right side
    290,316.60x = 39,477,588,758.25
  5. Step 5: Solve for x
    x = 39,477,588,758.25/290,316.60
  6. Step 6: Final answer
    x = 135,981.16

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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.