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Finding the Fourth Proportional to 403,398.80, 604,061.40 and 297,645.20

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Solution

The fourth proportional to 403,398.80, 604,061.40 and 297,645.20 is: 445,702.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,398.80 : 604,061.40 = 297,645.20 : x
  2. Step 2: Convert to fraction form
    403,398.80/604,061.40 = 297,645.20/x
  3. Step 3: Cross multiply
    403,398.80x = 604,061.40 × 297,645.20
  4. Step 4: Simplify right side
    403,398.80x = 179,795,976,215.28
  5. Step 5: Solve for x
    x = 179,795,976,215.28/403,398.80
  6. Step 6: Final answer
    x = 445,702.80

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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.