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Finding the Fourth Proportional to 621,875.32, 858,121.76 and 349,938.48

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Solution

The fourth proportional to 621,875.32, 858,121.76 and 349,938.48 is: 482,877.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,875.32 : 858,121.76 = 349,938.48 : x
  2. Step 2: Convert to fraction form
    621,875.32/858,121.76 = 349,938.48/x
  3. Step 3: Cross multiply
    621,875.32x = 858,121.76 × 349,938.48
  4. Step 4: Simplify right side
    621,875.32x = 300,289,824,349.33
  5. Step 5: Solve for x
    x = 300,289,824,349.33/621,875.32
  6. Step 6: Final answer
    x = 482,877.86

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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.