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Finding the Fourth Proportional to 393,415.64, 542,865.42 and 248,166.89

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Solution

The fourth proportional to 393,415.64, 542,865.42 and 248,166.89 is: 342,439.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,415.64 : 542,865.42 = 248,166.89 : x
  2. Step 2: Convert to fraction form
    393,415.64/542,865.42 = 248,166.89/x
  3. Step 3: Cross multiply
    393,415.64x = 542,865.42 × 248,166.89
  4. Step 4: Simplify right side
    393,415.64x = 134,721,224,239.86
  5. Step 5: Solve for x
    x = 134,721,224,239.86/393,415.64
  6. Step 6: Final answer
    x = 342,439.93

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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.