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Finding the Fourth Proportional to 621,366.57, 857,477.70 and 349,434.38

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Solution

The fourth proportional to 621,366.57, 857,477.70 and 349,434.38 is: 482,214.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,366.57 : 857,477.70 = 349,434.38 : x
  2. Step 2: Convert to fraction form
    621,366.57/857,477.70 = 349,434.38/x
  3. Step 3: Cross multiply
    621,366.57x = 857,477.70 × 349,434.38
  4. Step 4: Simplify right side
    621,366.57x = 299,632,190,607.02
  5. Step 5: Solve for x
    x = 299,632,190,607.02/621,366.57
  6. Step 6: Final answer
    x = 482,214.86

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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.