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Finding the Fourth Proportional to 518,838.37, 715,995.10 and 289,395.47

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Solution

The fourth proportional to 518,838.37, 715,995.10 and 289,395.47 is: 399,364.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,838.37 : 715,995.10 = 289,395.47 : x
  2. Step 2: Convert to fraction form
    518,838.37/715,995.10 = 289,395.47/x
  3. Step 3: Cross multiply
    518,838.37x = 715,995.10 × 289,395.47
  4. Step 4: Simplify right side
    518,838.37x = 207,205,739,548.70
  5. Step 5: Solve for x
    x = 207,205,739,548.70/518,838.37
  6. Step 6: Final answer
    x = 399,364.72

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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.