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Finding the Fourth Proportional to 283,356.40, 391,017.81 and 156,008.20

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Solution

The fourth proportional to 283,356.40, 391,017.81 and 156,008.20 is: 215,283.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,356.40 : 391,017.81 = 156,008.20 : x
  2. Step 2: Convert to fraction form
    283,356.40/391,017.81 = 156,008.20/x
  3. Step 3: Cross multiply
    283,356.40x = 391,017.81 × 156,008.20
  4. Step 4: Simplify right side
    283,356.40x = 61,001,984,706.04
  5. Step 5: Solve for x
    x = 61,001,984,706.04/283,356.40
  6. Step 6: Final answer
    x = 215,283.60

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.