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Finding the Fourth Proportional to 403,615.86, 604,490.67 and 389,619.06

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Solution

The fourth proportional to 403,615.86, 604,490.67 and 389,619.06 is: 583,527.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,615.86 : 604,490.67 = 389,619.06 : x
  2. Step 2: Convert to fraction form
    403,615.86/604,490.67 = 389,619.06/x
  3. Step 3: Cross multiply
    403,615.86x = 604,490.67 × 389,619.06
  4. Step 4: Simplify right side
    403,615.86x = 235,521,086,624.17
  5. Step 5: Solve for x
    x = 235,521,086,624.17/403,615.86
  6. Step 6: Final answer
    x = 583,527.83

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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.