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Finding the Fourth Proportional to 715,550.16, 987,482.89 and 393,271.68

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Solution

The fourth proportional to 715,550.16, 987,482.89 and 393,271.68 is: 542,727.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,550.16 : 987,482.89 = 393,271.68 : x
  2. Step 2: Convert to fraction form
    715,550.16/987,482.89 = 393,271.68/x
  3. Step 3: Cross multiply
    715,550.16x = 987,482.89 × 393,271.68
  4. Step 4: Simplify right side
    715,550.16x = 388,349,055,121.56
  5. Step 5: Solve for x
    x = 388,349,055,121.56/715,550.16
  6. Step 6: Final answer
    x = 542,727.93

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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.