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Finding the Fourth Proportional to 216,279.84, 322,420.56 and 212,871.36

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Solution

The fourth proportional to 216,279.84, 322,420.56 and 212,871.36 is: 317,339.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,279.84 : 322,420.56 = 212,871.36 : x
  2. Step 2: Convert to fraction form
    216,279.84/322,420.56 = 212,871.36/x
  3. Step 3: Cross multiply
    216,279.84x = 322,420.56 × 212,871.36
  4. Step 4: Simplify right side
    216,279.84x = 68,634,103,099.16
  5. Step 5: Solve for x
    x = 68,634,103,099.16/216,279.84
  6. Step 6: Final answer
    x = 317,339.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.