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Finding the Fourth Proportional to 613,861.56, 920,792.34 and 579,209.40

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Solution

The fourth proportional to 613,861.56, 920,792.34 and 579,209.40 is: 868,814.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,861.56 : 920,792.34 = 579,209.40 : x
  2. Step 2: Convert to fraction form
    613,861.56/920,792.34 = 579,209.40/x
  3. Step 3: Cross multiply
    613,861.56x = 920,792.34 × 579,209.40
  4. Step 4: Simplify right side
    613,861.56x = 533,331,578,776.00
  5. Step 5: Solve for x
    x = 533,331,578,776.00/613,861.56
  6. Step 6: Final answer
    x = 868,814.10

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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.