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Finding the Fourth Proportional to 550,699.72, 759,938.58 and 312,189.64

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Solution

The fourth proportional to 550,699.72, 759,938.58 and 312,189.64 is: 430,806.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,699.72 : 759,938.58 = 312,189.64 : x
  2. Step 2: Convert to fraction form
    550,699.72/759,938.58 = 312,189.64/x
  3. Step 3: Cross multiply
    550,699.72x = 759,938.58 × 312,189.64
  4. Step 4: Simplify right side
    550,699.72x = 237,244,951,712.31
  5. Step 5: Solve for x
    x = 237,244,951,712.31/550,699.72
  6. Step 6: Final answer
    x = 430,806.38

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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.