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Finding the Fourth Proportional to 403,687.80, 604,365.30 and 392,023.80

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Solution

The fourth proportional to 403,687.80, 604,365.30 and 392,023.80 is: 586,903.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,687.80 : 604,365.30 = 392,023.80 : x
  2. Step 2: Convert to fraction form
    403,687.80/604,365.30 = 392,023.80/x
  3. Step 3: Cross multiply
    403,687.80x = 604,365.30 × 392,023.80
  4. Step 4: Simplify right side
    403,687.80x = 236,925,581,494.14
  5. Step 5: Solve for x
    x = 236,925,581,494.14/403,687.80
  6. Step 6: Final answer
    x = 586,903.00

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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.