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Finding the Fourth Proportional to 418,871.02, 623,568.72 and 416,379.87

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Solution

The fourth proportional to 418,871.02, 623,568.72 and 416,379.87 is: 619,860.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,871.02 : 623,568.72 = 416,379.87 : x
  2. Step 2: Convert to fraction form
    418,871.02/623,568.72 = 416,379.87/x
  3. Step 3: Cross multiply
    418,871.02x = 623,568.72 × 416,379.87
  4. Step 4: Simplify right side
    418,871.02x = 259,641,462,569.67
  5. Step 5: Solve for x
    x = 259,641,462,569.67/418,871.02
  6. Step 6: Final answer
    x = 619,860.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.