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Finding the Fourth Proportional to 504,320.80, 696,000.72 and 289,530.40

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Solution

The fourth proportional to 504,320.80, 696,000.72 and 289,530.40 is: 399,573.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    504,320.80 : 696,000.72 = 289,530.40 : x
  2. Step 2: Convert to fraction form
    504,320.80/696,000.72 = 289,530.40/x
  3. Step 3: Cross multiply
    504,320.80x = 696,000.72 × 289,530.40
  4. Step 4: Simplify right side
    504,320.80x = 201,513,366,861.89
  5. Step 5: Solve for x
    x = 201,513,366,861.89/504,320.80
  6. Step 6: Final answer
    x = 399,573.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.