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Finding the Fourth Proportional to 290,808.40, 407,961.20 and 290,808.40

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Solution

The fourth proportional to 290,808.40, 407,961.20 and 290,808.40 is: 407,961.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,808.40 : 407,961.20 = 290,808.40 : x
  2. Step 2: Convert to fraction form
    290,808.40/407,961.20 = 290,808.40/x
  3. Step 3: Cross multiply
    290,808.40x = 407,961.20 × 290,808.40
  4. Step 4: Simplify right side
    290,808.40x = 118,638,543,834.08
  5. Step 5: Solve for x
    x = 118,638,543,834.08/290,808.40
  6. Step 6: Final answer
    x = 407,961.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.