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Finding the Fourth Proportional to 353,113.10, 528,978.45 and 212,453.90

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Solution

The fourth proportional to 353,113.10, 528,978.45 and 212,453.90 is: 318,264.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,113.10 : 528,978.45 = 212,453.90 : x
  2. Step 2: Convert to fraction form
    353,113.10/528,978.45 = 212,453.90/x
  3. Step 3: Cross multiply
    353,113.10x = 528,978.45 × 212,453.90
  4. Step 4: Simplify right side
    353,113.10x = 112,383,534,718.46
  5. Step 5: Solve for x
    x = 112,383,534,718.46/353,113.10
  6. Step 6: Final answer
    x = 318,264.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.