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Finding the Fourth Proportional to 557,640.76, 769,544.58 and 302,991.88

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Solution

The fourth proportional to 557,640.76, 769,544.58 and 302,991.88 is: 418,128.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,640.76 : 769,544.58 = 302,991.88 : x
  2. Step 2: Convert to fraction form
    557,640.76/769,544.58 = 302,991.88/x
  3. Step 3: Cross multiply
    557,640.76x = 769,544.58 × 302,991.88
  4. Step 4: Simplify right side
    557,640.76x = 233,165,759,038.01
  5. Step 5: Solve for x
    x = 233,165,759,038.01/557,640.76
  6. Step 6: Final answer
    x = 418,128.97

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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.