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Finding the Fourth Proportional to 402,705.20, 604,230.60 and 205,713.20

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Solution

The fourth proportional to 402,705.20, 604,230.60 and 205,713.20 is: 308,658.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,705.20 : 604,230.60 = 205,713.20 : x
  2. Step 2: Convert to fraction form
    402,705.20/604,230.60 = 205,713.20/x
  3. Step 3: Cross multiply
    402,705.20x = 604,230.60 × 205,713.20
  4. Step 4: Simplify right side
    402,705.20x = 124,298,210,263.92
  5. Step 5: Solve for x
    x = 124,298,210,263.92/402,705.20
  6. Step 6: Final answer
    x = 308,658.07

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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.