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Finding the Fourth Proportional to 557,187, 768,918.06 and 318,723

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Solution

The fourth proportional to 557,187, 768,918.06 and 318,723 is: 439,837.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,187 : 768,918.06 = 318,723 : x
  2. Step 2: Convert to fraction form
    557,187/768,918.06 = 318,723/x
  3. Step 3: Cross multiply
    557,187x = 768,918.06 × 318,723
  4. Step 4: Simplify right side
    557,187x = 245,071,870,837.38
  5. Step 5: Solve for x
    x = 245,071,870,837.38/557,187
  6. Step 6: Final answer
    x = 439,837.74

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1.5x scale

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.