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Finding the Fourth Proportional to 518,225.63, 715,173.57 and 288,783.23

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Solution

The fourth proportional to 518,225.63, 715,173.57 and 288,783.23 is: 398,533.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,225.63 : 715,173.57 = 288,783.23 : x
  2. Step 2: Convert to fraction form
    518,225.63/715,173.57 = 288,783.23/x
  3. Step 3: Cross multiply
    518,225.63x = 715,173.57 × 288,783.23
  4. Step 4: Simplify right side
    518,225.63x = 206,530,129,979.36
  5. Step 5: Solve for x
    x = 206,530,129,979.36/518,225.63
  6. Step 6: Final answer
    x = 398,533.23

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Double scale
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Similar ratio
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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.