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Finding the Fourth Proportional to 290,465.40, 434,531.70 and 251,455.80

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Solution

The fourth proportional to 290,465.40, 434,531.70 and 251,455.80 is: 376,173.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,465.40 : 434,531.70 = 251,455.80 : x
  2. Step 2: Convert to fraction form
    290,465.40/434,531.70 = 251,455.80/x
  3. Step 3: Cross multiply
    290,465.40x = 434,531.70 × 251,455.80
  4. Step 4: Simplify right side
    290,465.40x = 109,265,516,248.86
  5. Step 5: Solve for x
    x = 109,265,516,248.86/290,465.40
  6. Step 6: Final answer
    x = 376,173.95

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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.