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Finding the Fourth Proportional to 1,868,439.94, 2,578,447.15 and 1,009,000.20

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Solution

The fourth proportional to 1,868,439.94, 2,578,447.15 and 1,009,000.20 is: 1,392,420.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868,439.94 : 2,578,447.15 = 1,009,000.20 : x
  2. Step 2: Convert to fraction form
    1,868,439.94/2,578,447.15 = 1,009,000.20/x
  3. Step 3: Cross multiply
    1,868,439.94x = 2,578,447.15 × 1,009,000.20
  4. Step 4: Simplify right side
    1,868,439.94x = 2,601,653,697,186.11
  5. Step 5: Solve for x
    x = 2,601,653,697,186.11/1,868,439.94
  6. Step 6: Final answer
    x = 1,392,420.30

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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.