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Finding the Fourth Proportional to 400,697.72, 552,938.40 and 219,411.80

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Solution

The fourth proportional to 400,697.72, 552,938.40 and 219,411.80 is: 302,774.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,697.72 : 552,938.40 = 219,411.80 : x
  2. Step 2: Convert to fraction form
    400,697.72/552,938.40 = 219,411.80/x
  3. Step 3: Cross multiply
    400,697.72x = 552,938.40 × 219,411.80
  4. Step 4: Simplify right side
    400,697.72x = 121,321,209,633.12
  5. Step 5: Solve for x
    x = 121,321,209,633.12/400,697.72
  6. Step 6: Final answer
    x = 302,774.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.