Home / 283,161.78-390,771-155,845.17

Finding the Fourth Proportional to 283,161.78, 390,771 and 155,845.17

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Solution

The fourth proportional to 283,161.78, 390,771 and 155,845.17 is: 215,070.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,161.78 : 390,771 = 155,845.17 : x
  2. Step 2: Convert to fraction form
    283,161.78/390,771 = 155,845.17/x
  3. Step 3: Cross multiply
    283,161.78x = 390,771 × 155,845.17
  4. Step 4: Simplify right side
    283,161.78x = 60,899,772,926.07
  5. Step 5: Solve for x
    x = 60,899,772,926.07/283,161.78
  6. Step 6: Final answer
    x = 215,070.60

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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.