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Finding the Fourth Proportional to 557,608.71, 769,474.94 and 315,886.35

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Solution

The fourth proportional to 557,608.71, 769,474.94 and 315,886.35 is: 435,908.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,608.71 : 769,474.94 = 315,886.35 : x
  2. Step 2: Convert to fraction form
    557,608.71/769,474.94 = 315,886.35/x
  3. Step 3: Cross multiply
    557,608.71x = 769,474.94 × 315,886.35
  4. Step 4: Simplify right side
    557,608.71x = 243,066,630,213.07
  5. Step 5: Solve for x
    x = 243,066,630,213.07/557,608.71
  6. Step 6: Final answer
    x = 435,908.96

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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.