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Finding the Fourth Proportional to 283,197.72, 390,809.80 and 155,870.56

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Solution

The fourth proportional to 283,197.72, 390,809.80 and 155,870.56 is: 215,099.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,197.72 : 390,809.80 = 155,870.56 : x
  2. Step 2: Convert to fraction form
    283,197.72/390,809.80 = 155,870.56/x
  3. Step 3: Cross multiply
    283,197.72x = 390,809.80 × 155,870.56
  4. Step 4: Simplify right side
    283,197.72x = 60,915,742,379.49
  5. Step 5: Solve for x
    x = 60,915,742,379.49/283,197.72
  6. Step 6: Final answer
    x = 215,099.69

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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.