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Finding the Fourth Proportional to 927,054.12, 1,388,203.02 and 642,340.20

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Solution

The fourth proportional to 927,054.12, 1,388,203.02 and 642,340.20 is: 961,862.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    927,054.12 : 1,388,203.02 = 642,340.20 : x
  2. Step 2: Convert to fraction form
    927,054.12/1,388,203.02 = 642,340.20/x
  3. Step 3: Cross multiply
    927,054.12x = 1,388,203.02 × 642,340.20
  4. Step 4: Simplify right side
    927,054.12x = 891,698,605,507.40
  5. Step 5: Solve for x
    x = 891,698,605,507.40/927,054.12
  6. Step 6: Final answer
    x = 961,862.51

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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.