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Finding the Fourth Proportional to 557,339.12, 769,175.43 and 315,664.69

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Solution

The fourth proportional to 557,339.12, 769,175.43 and 315,664.69 is: 435,644.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,339.12 : 769,175.43 = 315,664.69 : x
  2. Step 2: Convert to fraction form
    557,339.12/769,175.43 = 315,664.69/x
  3. Step 3: Cross multiply
    557,339.12x = 769,175.43 × 315,664.69
  4. Step 4: Simplify right side
    557,339.12x = 242,801,518,242.37
  5. Step 5: Solve for x
    x = 242,801,518,242.37/557,339.12
  6. Step 6: Final answer
    x = 435,644.13

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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.