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Finding the Fourth Proportional to 715,037.33, 986,758.64 and 388,356.72

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Solution

The fourth proportional to 715,037.33, 986,758.64 and 388,356.72 is: 535,936.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,037.33 : 986,758.64 = 388,356.72 : x
  2. Step 2: Convert to fraction form
    715,037.33/986,758.64 = 388,356.72/x
  3. Step 3: Cross multiply
    715,037.33x = 986,758.64 × 388,356.72
  4. Step 4: Simplify right side
    715,037.33x = 383,214,346,920.28
  5. Step 5: Solve for x
    x = 383,214,346,920.28/715,037.33
  6. Step 6: Final answer
    x = 535,936.14

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1.5x scale

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.