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Finding the Fourth Proportional to 282,408, 389,723.04 and 155,085.72

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Solution

The fourth proportional to 282,408, 389,723.04 and 155,085.72 is: 214,018.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,408 : 389,723.04 = 155,085.72 : x
  2. Step 2: Convert to fraction form
    282,408/389,723.04 = 155,085.72/x
  3. Step 3: Cross multiply
    282,408x = 389,723.04 × 155,085.72
  4. Step 4: Simplify right side
    282,408x = 60,440,478,258.99
  5. Step 5: Solve for x
    x = 60,440,478,258.99/282,408
  6. Step 6: Final answer
    x = 214,018.29

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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.