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Finding the Fourth Proportional to 518,195.74, 776,703.98 and 315,344.45

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Solution

The fourth proportional to 518,195.74, 776,703.98 and 315,344.45 is: 472,657.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,195.74 : 776,703.98 = 315,344.45 : x
  2. Step 2: Convert to fraction form
    518,195.74/776,703.98 = 315,344.45/x
  3. Step 3: Cross multiply
    518,195.74x = 776,703.98 × 315,344.45
  4. Step 4: Simplify right side
    518,195.74x = 244,929,289,385.91
  5. Step 5: Solve for x
    x = 244,929,289,385.91/518,195.74
  6. Step 6: Final answer
    x = 472,657.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.