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Finding the Fourth Proportional to 768,368.72, 1,152,682.68 and 319,330.64

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Solution

The fourth proportional to 768,368.72, 1,152,682.68 and 319,330.64 is: 479,049.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,368.72 : 1,152,682.68 = 319,330.64 : x
  2. Step 2: Convert to fraction form
    768,368.72/1,152,682.68 = 319,330.64/x
  3. Step 3: Cross multiply
    768,368.72x = 1,152,682.68 × 319,330.64
  4. Step 4: Simplify right side
    768,368.72x = 368,086,897,921.32
  5. Step 5: Solve for x
    x = 368,086,897,921.32/768,368.72
  6. Step 6: Final answer
    x = 479,049.82

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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.