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Finding the Fourth Proportional to 503,715.60, 754,990.20 and 203,999.40

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Solution

The fourth proportional to 503,715.60, 754,990.20 and 203,999.40 is: 305,762.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    503,715.60 : 754,990.20 = 203,999.40 : x
  2. Step 2: Convert to fraction form
    503,715.60/754,990.20 = 203,999.40/x
  3. Step 3: Cross multiply
    503,715.60x = 754,990.20 × 203,999.40
  4. Step 4: Simplify right side
    503,715.60x = 154,017,547,805.88
  5. Step 5: Solve for x
    x = 154,017,547,805.88/503,715.60
  6. Step 6: Final answer
    x = 305,762.91

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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.