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Finding the Fourth Proportional to 307,012.80, 423,648.72 and 171,032.88

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Solution

The fourth proportional to 307,012.80, 423,648.72 and 171,032.88 is: 236,009.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,012.80 : 423,648.72 = 171,032.88 : x
  2. Step 2: Convert to fraction form
    307,012.80/423,648.72 = 171,032.88/x
  3. Step 3: Cross multiply
    307,012.80x = 423,648.72 × 171,032.88
  4. Step 4: Simplify right side
    307,012.80x = 72,457,860,689.91
  5. Step 5: Solve for x
    x = 72,457,860,689.91/307,012.80
  6. Step 6: Final answer
    x = 236,009.25

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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.