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Finding the Fourth Proportional to 5,308,966.86, 7,963,478.73 and 1,319,878.86

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Solution

The fourth proportional to 5,308,966.86, 7,963,478.73 and 1,319,878.86 is: 1,979,825.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,308,966.86 : 7,963,478.73 = 1,319,878.86 : x
  2. Step 2: Convert to fraction form
    5,308,966.86/7,963,478.73 = 1,319,878.86/x
  3. Step 3: Cross multiply
    5,308,966.86x = 7,963,478.73 × 1,319,878.86
  4. Step 4: Simplify right side
    5,308,966.86x = 10,510,827,227,786.65
  5. Step 5: Solve for x
    x = 10,510,827,227,786.65/5,308,966.86
  6. Step 6: Final answer
    x = 1,979,825.36

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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.