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Finding the Fourth Proportional to 698,880.72, 1,048,805.76 and 319,847.76

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Solution

The fourth proportional to 698,880.72, 1,048,805.76 and 319,847.76 is: 479,993.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,880.72 : 1,048,805.76 = 319,847.76 : x
  2. Step 2: Convert to fraction form
    698,880.72/1,048,805.76 = 319,847.76/x
  3. Step 3: Cross multiply
    698,880.72x = 1,048,805.76 × 319,847.76
  4. Step 4: Simplify right side
    698,880.72x = 335,458,173,011.10
  5. Step 5: Solve for x
    x = 335,458,173,011.10/698,880.72
  6. Step 6: Final answer
    x = 479,993.46

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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.