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Finding the Fourth Proportional to 280,281.99, 386,688 and 215,770.98

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Solution

The fourth proportional to 280,281.99, 386,688 and 215,770.98 is: 297,686.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,281.99 : 386,688 = 215,770.98 : x
  2. Step 2: Convert to fraction form
    280,281.99/386,688 = 215,770.98/x
  3. Step 3: Cross multiply
    280,281.99x = 386,688 × 215,770.98
  4. Step 4: Simplify right side
    280,281.99x = 83,436,048,714.24
  5. Step 5: Solve for x
    x = 83,436,048,714.24/280,281.99
  6. Step 6: Final answer
    x = 297,686.09

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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.