Home / 1,121,238,127.20-1,681,857,190.80-538,831,935.30

Finding the Fourth Proportional to 1,121,238,127.20, 1,681,857,190.80 and 538,831,935.30

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Solution

The fourth proportional to 1,121,238,127.20, 1,681,857,190.80 and 538,831,935.30 is: 808,247,902.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121,238,127.20 : 1,681,857,190.80 = 538,831,935.30 : x
  2. Step 2: Convert to fraction form
    1,121,238,127.20/1,681,857,190.80 = 538,831,935.30/x
  3. Step 3: Cross multiply
    1,121,238,127.20x = 1,681,857,190.80 × 538,831,935.30
  4. Step 4: Simplify right side
    1,121,238,127.20x = 906,238,365,016,985,216
  5. Step 5: Solve for x
    x = 906,238,365,016,985,216/1,121,238,127.20
  6. Step 6: Final answer
    x = 808,247,902.95

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Double scale
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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.