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Finding the Fourth Proportional to 678,730.20, 936,649.60 and 376,924.20

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Solution

The fourth proportional to 678,730.20, 936,649.60 and 376,924.20 is: 520,156.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,730.20 : 936,649.60 = 376,924.20 : x
  2. Step 2: Convert to fraction form
    678,730.20/936,649.60 = 376,924.20/x
  3. Step 3: Cross multiply
    678,730.20x = 936,649.60 × 376,924.20
  4. Step 4: Simplify right side
    678,730.20x = 353,045,901,160.32
  5. Step 5: Solve for x
    x = 353,045,901,160.32/678,730.20
  6. Step 6: Final answer
    x = 520,156.46

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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.