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Finding the Fourth Proportional to 640,459.76, 883,880.22 and 353,973.68

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Solution

The fourth proportional to 640,459.76, 883,880.22 and 353,973.68 is: 488,508.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,459.76 : 883,880.22 = 353,973.68 : x
  2. Step 2: Convert to fraction form
    640,459.76/883,880.22 = 353,973.68/x
  3. Step 3: Cross multiply
    640,459.76x = 883,880.22 × 353,973.68
  4. Step 4: Simplify right side
    640,459.76x = 312,870,334,152.61
  5. Step 5: Solve for x
    x = 312,870,334,152.61/640,459.76
  6. Step 6: Final answer
    x = 488,508.96

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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.