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Finding the Fourth Proportional to 309,442.95, 427,032.18 and 171,631.71

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Solution

The fourth proportional to 309,442.95, 427,032.18 and 171,631.71 is: 236,852.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,442.95 : 427,032.18 = 171,631.71 : x
  2. Step 2: Convert to fraction form
    309,442.95/427,032.18 = 171,631.71/x
  3. Step 3: Cross multiply
    309,442.95x = 427,032.18 × 171,631.71
  4. Step 4: Simplify right side
    309,442.95x = 73,292,263,278.43
  5. Step 5: Solve for x
    x = 73,292,263,278.43/309,442.95
  6. Step 6: Final answer
    x = 236,852.26

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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.