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Finding the Fourth Proportional to 684,621.15, 944,704.45 and 378,648.91

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Solution

The fourth proportional to 684,621.15, 944,704.45 and 378,648.91 is: 522,495.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,621.15 : 944,704.45 = 378,648.91 : x
  2. Step 2: Convert to fraction form
    684,621.15/944,704.45 = 378,648.91/x
  3. Step 3: Cross multiply
    684,621.15x = 944,704.45 × 378,648.91
  4. Step 4: Simplify right side
    684,621.15x = 357,711,311,918.84
  5. Step 5: Solve for x
    x = 357,711,311,918.84/684,621.15
  6. Step 6: Final answer
    x = 522,495.27

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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.