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Finding the Fourth Proportional to 403,616.61, 604,491.80 and 389,619.81

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Solution

The fourth proportional to 403,616.61, 604,491.80 and 389,619.81 is: 583,528.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,616.61 : 604,491.80 = 389,619.81 : x
  2. Step 2: Convert to fraction form
    403,616.61/604,491.80 = 389,619.81/x
  3. Step 3: Cross multiply
    403,616.61x = 604,491.80 × 389,619.81
  4. Step 4: Simplify right side
    403,616.61x = 235,521,978,314.46
  5. Step 5: Solve for x
    x = 235,521,978,314.46/403,616.61
  6. Step 6: Final answer
    x = 583,528.95

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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.