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Finding the Fourth Proportional to 612,222.70, 917,568.60 and 312,822.40

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Solution

The fourth proportional to 612,222.70, 917,568.60 and 312,822.40 is: 468,842.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,222.70 : 917,568.60 = 312,822.40 : x
  2. Step 2: Convert to fraction form
    612,222.70/917,568.60 = 312,822.40/x
  3. Step 3: Cross multiply
    612,222.70x = 917,568.60 × 312,822.40
  4. Step 4: Simplify right side
    612,222.70x = 287,036,011,616.64
  5. Step 5: Solve for x
    x = 287,036,011,616.64/612,222.70
  6. Step 6: Final answer
    x = 468,842.48

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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.