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Finding the Fourth Proportional to 290,435.20, 435,652.80 and 190,902.40

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Solution

The fourth proportional to 290,435.20, 435,652.80 and 190,902.40 is: 286,353.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,435.20 : 435,652.80 = 190,902.40 : x
  2. Step 2: Convert to fraction form
    290,435.20/435,652.80 = 190,902.40/x
  3. Step 3: Cross multiply
    290,435.20x = 435,652.80 × 190,902.40
  4. Step 4: Simplify right side
    290,435.20x = 83,167,165,086.72
  5. Step 5: Solve for x
    x = 83,167,165,086.72/290,435.20
  6. Step 6: Final answer
    x = 286,353.60

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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.