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Finding the Fourth Proportional to 808,636.60, 1,212,954.90 and 717,657.40

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Solution

The fourth proportional to 808,636.60, 1,212,954.90 and 717,657.40 is: 1,076,486.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,636.60 : 1,212,954.90 = 717,657.40 : x
  2. Step 2: Convert to fraction form
    808,636.60/1,212,954.90 = 717,657.40/x
  3. Step 3: Cross multiply
    808,636.60x = 1,212,954.90 × 717,657.40
  4. Step 4: Simplify right side
    808,636.60x = 870,486,059,851.26
  5. Step 5: Solve for x
    x = 870,486,059,851.26/808,636.60
  6. Step 6: Final answer
    x = 1,076,486.10

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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.