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Finding the Fourth Proportional to 403,218.90, 604,828.35 and 328,569.30

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Solution

The fourth proportional to 403,218.90, 604,828.35 and 328,569.30 is: 492,853.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,218.90 : 604,828.35 = 328,569.30 : x
  2. Step 2: Convert to fraction form
    403,218.90/604,828.35 = 328,569.30/x
  3. Step 3: Cross multiply
    403,218.90x = 604,828.35 × 328,569.30
  4. Step 4: Simplify right side
    403,218.90x = 198,728,027,579.66
  5. Step 5: Solve for x
    x = 198,728,027,579.66/403,218.90
  6. Step 6: Final answer
    x = 492,853.95

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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.