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Finding the Fourth Proportional to 355,482.98, 490,572.34 and 212,255.54

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Solution

The fourth proportional to 355,482.98, 490,572.34 and 212,255.54 is: 292,916.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,482.98 : 490,572.34 = 212,255.54 : x
  2. Step 2: Convert to fraction form
    355,482.98/490,572.34 = 212,255.54/x
  3. Step 3: Cross multiply
    355,482.98x = 490,572.34 × 212,255.54
  4. Step 4: Simplify right side
    355,482.98x = 104,126,696,935.76
  5. Step 5: Solve for x
    x = 104,126,696,935.76/355,482.98
  6. Step 6: Final answer
    x = 292,916.12

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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.