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Finding the Fourth Proportional to 977,961.40, 1,371,012.20 and 977,961.40

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Solution

The fourth proportional to 977,961.40, 1,371,012.20 and 977,961.40 is: 1,371,012.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    977,961.40 : 1,371,012.20 = 977,961.40 : x
  2. Step 2: Convert to fraction form
    977,961.40/1,371,012.20 = 977,961.40/x
  3. Step 3: Cross multiply
    977,961.40x = 1,371,012.20 × 977,961.40
  4. Step 4: Simplify right side
    977,961.40x = 1,340,797,010,529.08
  5. Step 5: Solve for x
    x = 1,340,797,010,529.08/977,961.40
  6. Step 6: Final answer
    x = 1,371,012.20

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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.