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Finding the Fourth Proportional to 659,676.10, 989,842.20 and 260,329.90

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Solution

The fourth proportional to 659,676.10, 989,842.20 and 260,329.90 is: 390,624.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,676.10 : 989,842.20 = 260,329.90 : x
  2. Step 2: Convert to fraction form
    659,676.10/989,842.20 = 260,329.90/x
  3. Step 3: Cross multiply
    659,676.10x = 989,842.20 × 260,329.90
  4. Step 4: Simplify right side
    659,676.10x = 257,685,520,941.78
  5. Step 5: Solve for x
    x = 257,685,520,941.78/659,676.10
  6. Step 6: Final answer
    x = 390,624.31

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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.