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Finding the Fourth Proportional to 1,419,569.57, 1,958,931.90 and 774,865.20

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Solution

The fourth proportional to 1,419,569.57, 1,958,931.90 and 774,865.20 is: 1,069,273.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419,569.57 : 1,958,931.90 = 774,865.20 : x
  2. Step 2: Convert to fraction form
    1,419,569.57/1,958,931.90 = 774,865.20/x
  3. Step 3: Cross multiply
    1,419,569.57x = 1,958,931.90 × 774,865.20
  4. Step 4: Simplify right side
    1,419,569.57x = 1,517,908,168,005.18
  5. Step 5: Solve for x
    x = 1,517,908,168,005.18/1,419,569.57
  6. Step 6: Final answer
    x = 1,069,273.53

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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.