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Finding the Fourth Proportional to 518,898.88, 716,053.12 and 289,480.15

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Solution

The fourth proportional to 518,898.88, 716,053.12 and 289,480.15 is: 399,467.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,898.88 : 716,053.12 = 289,480.15 : x
  2. Step 2: Convert to fraction form
    518,898.88/716,053.12 = 289,480.15/x
  3. Step 3: Cross multiply
    518,898.88x = 716,053.12 × 289,480.15
  4. Step 4: Simplify right side
    518,898.88x = 207,283,164,585.57
  5. Step 5: Solve for x
    x = 207,283,164,585.57/518,898.88
  6. Step 6: Final answer
    x = 399,467.36

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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.