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Finding the Fourth Proportional to 355,563.95, 490,638.06 and 210,374.18

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Solution

The fourth proportional to 355,563.95, 490,638.06 and 210,374.18 is: 290,292.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,563.95 : 490,638.06 = 210,374.18 : x
  2. Step 2: Convert to fraction form
    355,563.95/490,638.06 = 210,374.18/x
  3. Step 3: Cross multiply
    355,563.95x = 490,638.06 × 210,374.18
  4. Step 4: Simplify right side
    355,563.95x = 103,217,578,935.99
  5. Step 5: Solve for x
    x = 103,217,578,935.99/355,563.95
  6. Step 6: Final answer
    x = 290,292.59

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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.