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Finding the Fourth Proportional to 1,868,472.78, 2,578,492.40 and 1,009,032.96

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Solution

The fourth proportional to 1,868,472.78, 2,578,492.40 and 1,009,032.96 is: 1,392,465.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868,472.78 : 2,578,492.40 = 1,009,032.96 : x
  2. Step 2: Convert to fraction form
    1,868,472.78/2,578,492.40 = 1,009,032.96/x
  3. Step 3: Cross multiply
    1,868,472.78x = 2,578,492.40 × 1,009,032.96
  4. Step 4: Simplify right side
    1,868,472.78x = 2,601,783,818,709.50
  5. Step 5: Solve for x
    x = 2,601,783,818,709.50/1,868,472.78
  6. Step 6: Final answer
    x = 1,392,465.47

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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.