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Finding the Fourth Proportional to 621,502.76, 857,665.32 and 349,570.60

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Solution

The fourth proportional to 621,502.76, 857,665.32 and 349,570.60 is: 482,402.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,502.76 : 857,665.32 = 349,570.60 : x
  2. Step 2: Convert to fraction form
    621,502.76/857,665.32 = 349,570.60/x
  3. Step 3: Cross multiply
    621,502.76x = 857,665.32 × 349,570.60
  4. Step 4: Simplify right side
    621,502.76x = 299,814,580,511.59
  5. Step 5: Solve for x
    x = 299,814,580,511.59/621,502.76
  6. Step 6: Final answer
    x = 482,402.65

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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.