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Finding the Fourth Proportional to 1,766,237.40, 2,645,856.90 and 1,640,266.20

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Solution

The fourth proportional to 1,766,237.40, 2,645,856.90 and 1,640,266.20 is: 2,457,149.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,766,237.40 : 2,645,856.90 = 1,640,266.20 : x
  2. Step 2: Convert to fraction form
    1,766,237.40/2,645,856.90 = 1,640,266.20/x
  3. Step 3: Cross multiply
    1,766,237.40x = 2,645,856.90 × 1,640,266.20
  4. Step 4: Simplify right side
    1,766,237.40x = 4,339,909,643,106.78
  5. Step 5: Solve for x
    x = 4,339,909,643,106.78/1,766,237.40
  6. Step 6: Final answer
    x = 2,457,149.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.