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Finding the Fourth Proportional to 456,689.91, 685,450.40 and 243,638.45

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Solution

The fourth proportional to 456,689.91, 685,450.40 and 243,638.45 is: 365,679.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,689.91 : 685,450.40 = 243,638.45 : x
  2. Step 2: Convert to fraction form
    456,689.91/685,450.40 = 243,638.45/x
  3. Step 3: Cross multiply
    456,689.91x = 685,450.40 × 243,638.45
  4. Step 4: Simplify right side
    456,689.91x = 167,002,068,362.44
  5. Step 5: Solve for x
    x = 167,002,068,362.44/456,689.91
  6. Step 6: Final answer
    x = 365,679.35

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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.