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Finding the Fourth Proportional to 660,842.20, 990,572.10 and 360,861.40

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Solution

The fourth proportional to 660,842.20, 990,572.10 and 360,861.40 is: 540,914.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,842.20 : 990,572.10 = 360,861.40 : x
  2. Step 2: Convert to fraction form
    660,842.20/990,572.10 = 360,861.40/x
  3. Step 3: Cross multiply
    660,842.20x = 990,572.10 × 360,861.40
  4. Step 4: Simplify right side
    660,842.20x = 357,459,234,806.94
  5. Step 5: Solve for x
    x = 357,459,234,806.94/660,842.20
  6. Step 6: Final answer
    x = 540,914.66

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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.