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Finding the Fourth Proportional to 385,018.34, 531,348.54 and 215,253.68

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Solution

The fourth proportional to 385,018.34, 531,348.54 and 215,253.68 is: 297,063.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,018.34 : 531,348.54 = 215,253.68 : x
  2. Step 2: Convert to fraction form
    385,018.34/531,348.54 = 215,253.68/x
  3. Step 3: Cross multiply
    385,018.34x = 531,348.54 × 215,253.68
  4. Step 4: Simplify right side
    385,018.34x = 114,374,728,597.63
  5. Step 5: Solve for x
    x = 114,374,728,597.63/385,018.34
  6. Step 6: Final answer
    x = 297,063.07

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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.