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Finding the Fourth Proportional to 378,605.34, 522,421.65 and 235,313.10

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Solution

The fourth proportional to 378,605.34, 522,421.65 and 235,313.10 is: 324,698.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,605.34 : 522,421.65 = 235,313.10 : x
  2. Step 2: Convert to fraction form
    378,605.34/522,421.65 = 235,313.10/x
  3. Step 3: Cross multiply
    378,605.34x = 522,421.65 × 235,313.10
  4. Step 4: Simplify right side
    378,605.34x = 122,932,657,968.62
  5. Step 5: Solve for x
    x = 122,932,657,968.62/378,605.34
  6. Step 6: Final answer
    x = 324,698.69

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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.