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Finding the Fourth Proportional to 283,157.28, 390,764.79 and 155,840.67

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Solution

The fourth proportional to 283,157.28, 390,764.79 and 155,840.67 is: 215,064.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,157.28 : 390,764.79 = 155,840.67 : x
  2. Step 2: Convert to fraction form
    283,157.28/390,764.79 = 155,840.67/x
  3. Step 3: Cross multiply
    283,157.28x = 390,764.79 × 155,840.67
  4. Step 4: Simplify right side
    283,157.28x = 60,897,046,686.01
  5. Step 5: Solve for x
    x = 60,897,046,686.01/283,157.28
  6. Step 6: Final answer
    x = 215,064.39

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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.