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Finding the Fourth Proportional to 659,620.20, 989,430.30 and 492,314.70

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Solution

The fourth proportional to 659,620.20, 989,430.30 and 492,314.70 is: 738,472.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,620.20 : 989,430.30 = 492,314.70 : x
  2. Step 2: Convert to fraction form
    659,620.20/989,430.30 = 492,314.70/x
  3. Step 3: Cross multiply
    659,620.20x = 989,430.30 × 492,314.70
  4. Step 4: Simplify right side
    659,620.20x = 487,111,081,315.41
  5. Step 5: Solve for x
    x = 487,111,081,315.41/659,620.20
  6. Step 6: Final answer
    x = 738,472.05

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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.