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Finding the Fourth Proportional to 427,431.30, 640,909.95 and 174,888.96

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Solution

The fourth proportional to 427,431.30, 640,909.95 and 174,888.96 is: 262,236.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,431.30 : 640,909.95 = 174,888.96 : x
  2. Step 2: Convert to fraction form
    427,431.30/640,909.95 = 174,888.96/x
  3. Step 3: Cross multiply
    427,431.30x = 640,909.95 × 174,888.96
  4. Step 4: Simplify right side
    427,431.30x = 112,088,074,609.15
  5. Step 5: Solve for x
    x = 112,088,074,609.15/427,431.30
  6. Step 6: Final answer
    x = 262,236.47

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1.5x scale

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.