Home / 515,815.76-711,876.86-289,462.16

Finding the Fourth Proportional to 515,815.76, 711,876.86 and 289,462.16

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Solution

The fourth proportional to 515,815.76, 711,876.86 and 289,462.16 is: 399,486.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,815.76 : 711,876.86 = 289,462.16 : x
  2. Step 2: Convert to fraction form
    515,815.76/711,876.86 = 289,462.16/x
  3. Step 3: Cross multiply
    515,815.76x = 711,876.86 × 289,462.16
  4. Step 4: Simplify right side
    515,815.76x = 206,061,413,549.62
  5. Step 5: Solve for x
    x = 206,061,413,549.62/515,815.76
  6. Step 6: Final answer
    x = 399,486.46

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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.