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Finding the Fourth Proportional to 768,607.67, 1,152,953.72 and 319,373.97

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Solution

The fourth proportional to 768,607.67, 1,152,953.72 and 319,373.97 is: 479,078.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,607.67 : 1,152,953.72 = 319,373.97 : x
  2. Step 2: Convert to fraction form
    768,607.67/1,152,953.72 = 319,373.97/x
  3. Step 3: Cross multiply
    768,607.67x = 1,152,953.72 × 319,373.97
  4. Step 4: Simplify right side
    768,607.67x = 368,223,405,185.80
  5. Step 5: Solve for x
    x = 368,223,405,185.80/768,607.67
  6. Step 6: Final answer
    x = 479,078.50

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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.