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Finding the Fourth Proportional to 368,855.90, 553,283.85 and 331,531.10

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Solution

The fourth proportional to 368,855.90, 553,283.85 and 331,531.10 is: 497,296.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,855.90 : 553,283.85 = 331,531.10 : x
  2. Step 2: Convert to fraction form
    368,855.90/553,283.85 = 331,531.10/x
  3. Step 3: Cross multiply
    368,855.90x = 553,283.85 × 331,531.10
  4. Step 4: Simplify right side
    368,855.90x = 183,430,803,402.74
  5. Step 5: Solve for x
    x = 183,430,803,402.74/368,855.90
  6. Step 6: Final answer
    x = 497,296.65

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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.