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Finding the Fourth Proportional to 1,390,278.60, 1,949,189.40 and 1,390,278.60

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Solution

The fourth proportional to 1,390,278.60, 1,949,189.40 and 1,390,278.60 is: 1,949,189.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,278.60 : 1,949,189.40 = 1,390,278.60 : x
  2. Step 2: Convert to fraction form
    1,390,278.60/1,949,189.40 = 1,390,278.60/x
  3. Step 3: Cross multiply
    1,390,278.60x = 1,949,189.40 × 1,390,278.60
  4. Step 4: Simplify right side
    1,390,278.60x = 2,709,916,310,166.84
  5. Step 5: Solve for x
    x = 2,709,916,310,166.84/1,390,278.60
  6. Step 6: Final answer
    x = 1,949,189.40

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.