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Finding the Fourth Proportional to 1,235,778,724.95, 1,703,751,871.91 and 891,772,209.60

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Solution

The fourth proportional to 1,235,778,724.95, 1,703,751,871.91 and 891,772,209.60 is: 1,229,474,614.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235,778,724.95 : 1,703,751,871.91 = 891,772,209.60 : x
  2. Step 2: Convert to fraction form
    1,235,778,724.95/1,703,751,871.91 = 891,772,209.60/x
  3. Step 3: Cross multiply
    1,235,778,724.95x = 1,703,751,871.91 × 891,772,209.60
  4. Step 4: Simplify right side
    1,235,778,724.95x = 1,519,358,571,418,857,984
  5. Step 5: Solve for x
    x = 1,519,358,571,418,857,984/1,235,778,724.95
  6. Step 6: Final answer
    x = 1,229,474,614.46

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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.