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Finding the Fourth Proportional to 881,607,219.12, 1,218,295,875.96 and 661,208,007.60

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Solution

The fourth proportional to 881,607,219.12, 1,218,295,875.96 and 661,208,007.60 is: 913,725,490.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    881,607,219.12 : 1,218,295,875.96 = 661,208,007.60 : x
  2. Step 2: Convert to fraction form
    881,607,219.12/1,218,295,875.96 = 661,208,007.60/x
  3. Step 3: Cross multiply
    881,607,219.12x = 1,218,295,875.96 × 661,208,007.60
  4. Step 4: Simplify right side
    881,607,219.12x = 805,546,988,810,808,448
  5. Step 5: Solve for x
    x = 805,546,988,810,808,448/881,607,219.12
  6. Step 6: Final answer
    x = 913,725,490.60

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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.