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Finding the Fourth Proportional to 5,318,803.40, 7,978,000.30 and 1,772,947.40

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Solution

The fourth proportional to 5,318,803.40, 7,978,000.30 and 1,772,947.40 is: 2,659,352.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,318,803.40 : 7,978,000.30 = 1,772,947.40 : x
  2. Step 2: Convert to fraction form
    5,318,803.40/7,978,000.30 = 1,772,947.40/x
  3. Step 3: Cross multiply
    5,318,803.40x = 7,978,000.30 × 1,772,947.40
  4. Step 4: Simplify right side
    5,318,803.40x = 14,144,574,889,084.22
  5. Step 5: Solve for x
    x = 14,144,574,889,084.22/5,318,803.40
  6. Step 6: Final answer
    x = 2,659,352.83

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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.