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Finding the Fourth Proportional to 518,979.01, 716,069 and 315,024.86

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Solution

The fourth proportional to 518,979.01, 716,069 and 315,024.86 is: 434,660.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,979.01 : 716,069 = 315,024.86 : x
  2. Step 2: Convert to fraction form
    518,979.01/716,069 = 315,024.86/x
  3. Step 3: Cross multiply
    518,979.01x = 716,069 × 315,024.86
  4. Step 4: Simplify right side
    518,979.01x = 225,579,536,475.34
  5. Step 5: Solve for x
    x = 225,579,536,475.34/518,979.01
  6. Step 6: Final answer
    x = 434,660.23

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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.