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Finding the Fourth Proportional to 518,734.90, 715,852.76 and 289,292.45

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Solution

The fourth proportional to 518,734.90, 715,852.76 and 289,292.45 is: 399,222.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,734.90 : 715,852.76 = 289,292.45 : x
  2. Step 2: Convert to fraction form
    518,734.90/715,852.76 = 289,292.45/x
  3. Step 3: Cross multiply
    518,734.90x = 715,852.76 × 289,292.45
  4. Step 4: Simplify right side
    518,734.90x = 207,090,793,753.94
  5. Step 5: Solve for x
    x = 207,090,793,753.94/518,734.90
  6. Step 6: Final answer
    x = 399,222.79

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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.