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Finding the Fourth Proportional to 390,662.19, 588,921.37 and 364,622.11

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Solution

The fourth proportional to 390,662.19, 588,921.37 and 364,622.11 is: 549,666.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,662.19 : 588,921.37 = 364,622.11 : x
  2. Step 2: Convert to fraction form
    390,662.19/588,921.37 = 364,622.11/x
  3. Step 3: Cross multiply
    390,662.19x = 588,921.37 × 364,622.11
  4. Step 4: Simplify right side
    390,662.19x = 214,733,750,169.63
  5. Step 5: Solve for x
    x = 214,733,750,169.63/390,662.19
  6. Step 6: Final answer
    x = 549,666.07

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.