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Finding the Fourth Proportional to 216,490.80, 298,563.68 and 135,925.76

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Solution

The fourth proportional to 216,490.80, 298,563.68 and 135,925.76 is: 187,455.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,490.80 : 298,563.68 = 135,925.76 : x
  2. Step 2: Convert to fraction form
    216,490.80/298,563.68 = 135,925.76/x
  3. Step 3: Cross multiply
    216,490.80x = 298,563.68 × 135,925.76
  4. Step 4: Simplify right side
    216,490.80x = 40,582,495,112.40
  5. Step 5: Solve for x
    x = 40,582,495,112.40/216,490.80
  6. Step 6: Final answer
    x = 187,455.98

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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.