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Finding the Fourth Proportional to 715,950.77, 988,015.74 and 393,681.65

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Solution

The fourth proportional to 715,950.77, 988,015.74 and 393,681.65 is: 543,282.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,950.77 : 988,015.74 = 393,681.65 : x
  2. Step 2: Convert to fraction form
    715,950.77/988,015.74 = 393,681.65/x
  3. Step 3: Cross multiply
    715,950.77x = 988,015.74 × 393,681.65
  4. Step 4: Simplify right side
    715,950.77x = 388,963,666,749.17
  5. Step 5: Solve for x
    x = 388,963,666,749.17/715,950.77
  6. Step 6: Final answer
    x = 543,282.70

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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.