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Finding the Fourth Proportional to 557,608.96, 769,475.28 and 315,886.60

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Solution

The fourth proportional to 557,608.96, 769,475.28 and 315,886.60 is: 435,909.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,608.96 : 769,475.28 = 315,886.60 : x
  2. Step 2: Convert to fraction form
    557,608.96/769,475.28 = 315,886.60/x
  3. Step 3: Cross multiply
    557,608.96x = 769,475.28 × 315,886.60
  4. Step 4: Simplify right side
    557,608.96x = 243,066,928,059.56
  5. Step 5: Solve for x
    x = 243,066,928,059.56/557,608.96
  6. Step 6: Final answer
    x = 435,909.30

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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.