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Finding the Fourth Proportional to 7,243,509.58, 9,986,054.89 and 5,778,390.88

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Solution

The fourth proportional to 7,243,509.58, 9,986,054.89 and 5,778,390.88 is: 7,966,211.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,243,509.58 : 9,986,054.89 = 5,778,390.88 : x
  2. Step 2: Convert to fraction form
    7,243,509.58/9,986,054.89 = 5,778,390.88/x
  3. Step 3: Cross multiply
    7,243,509.58x = 9,986,054.89 × 5,778,390.88
  4. Step 4: Simplify right side
    7,243,509.58x = 57,703,328,503,555.41
  5. Step 5: Solve for x
    x = 57,703,328,503,555.41/7,243,509.58
  6. Step 6: Final answer
    x = 7,966,211.39

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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.