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Finding the Fourth Proportional to 618,368.67, 926,345.01 and 426,208.95

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Solution

The fourth proportional to 618,368.67, 926,345.01 and 426,208.95 is: 638,480.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,368.67 : 926,345.01 = 426,208.95 : x
  2. Step 2: Convert to fraction form
    618,368.67/926,345.01 = 426,208.95/x
  3. Step 3: Cross multiply
    618,368.67x = 926,345.01 × 426,208.95
  4. Step 4: Simplify right side
    618,368.67x = 394,816,534,049.84
  5. Step 5: Solve for x
    x = 394,816,534,049.84/618,368.67
  6. Step 6: Final answer
    x = 638,480.82

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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.