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Finding the Fourth Proportional to 283,230.72, 390,860.16 and 155,903.04

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Solution

The fourth proportional to 283,230.72, 390,860.16 and 155,903.04 is: 215,147.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,230.72 : 390,860.16 = 155,903.04 : x
  2. Step 2: Convert to fraction form
    283,230.72/390,860.16 = 155,903.04/x
  3. Step 3: Cross multiply
    283,230.72x = 390,860.16 × 155,903.04
  4. Step 4: Simplify right side
    283,230.72x = 60,936,287,158.89
  5. Step 5: Solve for x
    x = 60,936,287,158.89/283,230.72
  6. Step 6: Final answer
    x = 215,147.17

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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.