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Finding the Fourth Proportional to 618,998.70, 928,368.45 and 303,681.90

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Solution

The fourth proportional to 618,998.70, 928,368.45 and 303,681.90 is: 455,459.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,998.70 : 928,368.45 = 303,681.90 : x
  2. Step 2: Convert to fraction form
    618,998.70/928,368.45 = 303,681.90/x
  3. Step 3: Cross multiply
    618,998.70x = 928,368.45 × 303,681.90
  4. Step 4: Simplify right side
    618,998.70x = 281,928,694,796.06
  5. Step 5: Solve for x
    x = 281,928,694,796.06/618,998.70
  6. Step 6: Final answer
    x = 455,459.27

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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.