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Finding the Fourth Proportional to 390,633.06, 539,187.08 and 227,327.72

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Solution

The fourth proportional to 390,633.06, 539,187.08 and 227,327.72 is: 313,778.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,633.06 : 539,187.08 = 227,327.72 : x
  2. Step 2: Convert to fraction form
    390,633.06/539,187.08 = 227,327.72/x
  3. Step 3: Cross multiply
    390,633.06x = 539,187.08 × 227,327.72
  4. Step 4: Simplify right side
    390,633.06x = 122,572,166,996.00
  5. Step 5: Solve for x
    x = 122,572,166,996.00/390,633.06
  6. Step 6: Final answer
    x = 313,778.28

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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.