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Finding the Fourth Proportional to 385,104.69, 531,468.99 and 215,338.77

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Solution

The fourth proportional to 385,104.69, 531,468.99 and 215,338.77 is: 297,181.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,104.69 : 531,468.99 = 215,338.77 : x
  2. Step 2: Convert to fraction form
    385,104.69/531,468.99 = 215,338.77/x
  3. Step 3: Cross multiply
    385,104.69x = 531,468.99 × 215,338.77
  4. Step 4: Simplify right side
    385,104.69x = 114,445,878,599.74
  5. Step 5: Solve for x
    x = 114,445,878,599.74/385,104.69
  6. Step 6: Final answer
    x = 297,181.21

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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.