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Finding the Fourth Proportional to 418,647.68, 577,124.16 and 317,870.72

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Solution

The fourth proportional to 418,647.68, 577,124.16 and 317,870.72 is: 438,198.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,647.68 : 577,124.16 = 317,870.72 : x
  2. Step 2: Convert to fraction form
    418,647.68/577,124.16 = 317,870.72/x
  3. Step 3: Cross multiply
    418,647.68x = 577,124.16 × 317,870.72
  4. Step 4: Simplify right side
    418,647.68x = 183,450,872,268.60
  5. Step 5: Solve for x
    x = 183,450,872,268.60/418,647.68
  6. Step 6: Final answer
    x = 438,198.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.