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Finding the Fourth Proportional to 557,661.08, 769,574.82 and 315,990.75

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Solution

The fourth proportional to 557,661.08, 769,574.82 and 315,990.75 is: 436,068.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,661.08 : 769,574.82 = 315,990.75 : x
  2. Step 2: Convert to fraction form
    557,661.08/769,574.82 = 315,990.75/x
  3. Step 3: Cross multiply
    557,661.08x = 769,574.82 × 315,990.75
  4. Step 4: Simplify right side
    557,661.08x = 243,178,522,130.50
  5. Step 5: Solve for x
    x = 243,178,522,130.50/557,661.08
  6. Step 6: Final answer
    x = 436,068.66

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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.