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Finding the Fourth Proportional to 354,342.61, 488,595.54 and 289,610.95

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Solution

The fourth proportional to 354,342.61, 488,595.54 and 289,610.95 is: 399,338.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,342.61 : 488,595.54 = 289,610.95 : x
  2. Step 2: Convert to fraction form
    354,342.61/488,595.54 = 289,610.95/x
  3. Step 3: Cross multiply
    354,342.61x = 488,595.54 × 289,610.95
  4. Step 4: Simplify right side
    354,342.61x = 141,502,618,505.16
  5. Step 5: Solve for x
    x = 141,502,618,505.16/354,342.61
  6. Step 6: Final answer
    x = 399,338.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.