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Finding the Fourth Proportional to 438,366.30, 657,808.65 and 319,739.10

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Solution

The fourth proportional to 438,366.30, 657,808.65 and 319,739.10 is: 479,797.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,366.30 : 657,808.65 = 319,739.10 : x
  2. Step 2: Convert to fraction form
    438,366.30/657,808.65 = 319,739.10/x
  3. Step 3: Cross multiply
    438,366.30x = 657,808.65 × 319,739.10
  4. Step 4: Simplify right side
    438,366.30x = 210,327,145,723.22
  5. Step 5: Solve for x
    x = 210,327,145,723.22/438,366.30
  6. Step 6: Final answer
    x = 479,797.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.