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Finding the Fourth Proportional to 290,084.55, 435,125.53 and 90,405.10

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Solution

The fourth proportional to 290,084.55, 435,125.53 and 90,405.10 is: 135,607.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,084.55 : 435,125.53 = 90,405.10 : x
  2. Step 2: Convert to fraction form
    290,084.55/435,125.53 = 90,405.10/x
  3. Step 3: Cross multiply
    290,084.55x = 435,125.53 × 90,405.10
  4. Step 4: Simplify right side
    290,084.55x = 39,337,567,052.20
  5. Step 5: Solve for x
    x = 39,337,567,052.20/290,084.55
  6. Step 6: Final answer
    x = 135,607.25

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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.