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Finding the Fourth Proportional to 684,891.78, 945,230.49 and 398,423.94

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Solution

The fourth proportional to 684,891.78, 945,230.49 and 398,423.94 is: 549,871.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,891.78 : 945,230.49 = 398,423.94 : x
  2. Step 2: Convert to fraction form
    684,891.78/945,230.49 = 398,423.94/x
  3. Step 3: Cross multiply
    684,891.78x = 945,230.49 × 398,423.94
  4. Step 4: Simplify right side
    684,891.78x = 376,602,456,033.93
  5. Step 5: Solve for x
    x = 376,602,456,033.93/684,891.78
  6. Step 6: Final answer
    x = 549,871.48

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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.