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Finding the Fourth Proportional to 557,120.12, 768,873.36 and 315,445.28

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Solution

The fourth proportional to 557,120.12, 768,873.36 and 315,445.28 is: 435,341.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,120.12 : 768,873.36 = 315,445.28 : x
  2. Step 2: Convert to fraction form
    557,120.12/768,873.36 = 315,445.28/x
  3. Step 3: Cross multiply
    557,120.12x = 768,873.36 × 315,445.28
  4. Step 4: Simplify right side
    557,120.12x = 242,537,472,329.74
  5. Step 5: Solve for x
    x = 242,537,472,329.74/557,120.12
  6. Step 6: Final answer
    x = 435,341.43

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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.