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Finding the Fourth Proportional to 640,346.87, 883,643.88 and 353,848.50

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Solution

The fourth proportional to 640,346.87, 883,643.88 and 353,848.50 is: 488,291.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,346.87 : 883,643.88 = 353,848.50 : x
  2. Step 2: Convert to fraction form
    640,346.87/883,643.88 = 353,848.50/x
  3. Step 3: Cross multiply
    640,346.87x = 883,643.88 × 353,848.50
  4. Step 4: Simplify right side
    640,346.87x = 312,676,062,799.11
  5. Step 5: Solve for x
    x = 312,676,062,799.11/640,346.87
  6. Step 6: Final answer
    x = 488,291.70

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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.