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Finding the Fourth Proportional to 5,978,840.20, 8,966,510.70 and 2,140,217.80

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Solution

The fourth proportional to 5,978,840.20, 8,966,510.70 and 2,140,217.80 is: 3,209,700.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,978,840.20 : 8,966,510.70 = 2,140,217.80 : x
  2. Step 2: Convert to fraction form
    5,978,840.20/8,966,510.70 = 2,140,217.80/x
  3. Step 3: Cross multiply
    5,978,840.20x = 8,966,510.70 × 2,140,217.80
  4. Step 4: Simplify right side
    5,978,840.20x = 19,190,285,804,030.46
  5. Step 5: Solve for x
    x = 19,190,285,804,030.46/5,978,840.20
  6. Step 6: Final answer
    x = 3,209,700.40

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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.