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Finding the Fourth Proportional to 686,377.21, 947,198.91 and 376,279.24

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Solution

The fourth proportional to 686,377.21, 947,198.91 and 376,279.24 is: 519,264.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,377.21 : 947,198.91 = 376,279.24 : x
  2. Step 2: Convert to fraction form
    686,377.21/947,198.91 = 376,279.24/x
  3. Step 3: Cross multiply
    686,377.21x = 947,198.91 × 376,279.24
  4. Step 4: Simplify right side
    686,377.21x = 356,411,285,983.63
  5. Step 5: Solve for x
    x = 356,411,285,983.63/686,377.21
  6. Step 6: Final answer
    x = 519,264.45

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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.