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Finding the Fourth Proportional to 390,431.61, 585,595.58 and 109,970.73

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Solution

The fourth proportional to 390,431.61, 585,595.58 and 109,970.73 is: 164,941.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,431.61 : 585,595.58 = 109,970.73 : x
  2. Step 2: Convert to fraction form
    390,431.61/585,595.58 = 109,970.73/x
  3. Step 3: Cross multiply
    390,431.61x = 585,595.58 × 109,970.73
  4. Step 4: Simplify right side
    390,431.61x = 64,398,372,867.52
  5. Step 5: Solve for x
    x = 64,398,372,867.52/390,431.61
  6. Step 6: Final answer
    x = 164,941.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.