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Finding the Fourth Proportional to 570,319.65, 786,958.74 and 315,670.23

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Solution

The fourth proportional to 570,319.65, 786,958.74 and 315,670.23 is: 435,579.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,319.65 : 786,958.74 = 315,670.23 : x
  2. Step 2: Convert to fraction form
    570,319.65/786,958.74 = 315,670.23/x
  3. Step 3: Cross multiply
    570,319.65x = 786,958.74 × 315,670.23
  4. Step 4: Simplify right side
    570,319.65x = 248,419,446,456.31
  5. Step 5: Solve for x
    x = 248,419,446,456.31/570,319.65
  6. Step 6: Final answer
    x = 435,579.32

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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.