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Finding the Fourth Proportional to 368,998.80, 553,498.20 and 102,800.40

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Solution

The fourth proportional to 368,998.80, 553,498.20 and 102,800.40 is: 154,200.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,998.80 : 553,498.20 = 102,800.40 : x
  2. Step 2: Convert to fraction form
    368,998.80/553,498.20 = 102,800.40/x
  3. Step 3: Cross multiply
    368,998.80x = 553,498.20 × 102,800.40
  4. Step 4: Simplify right side
    368,998.80x = 56,899,836,359.28
  5. Step 5: Solve for x
    x = 56,899,836,359.28/368,998.80
  6. Step 6: Final answer
    x = 154,200.60

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1.5x scale

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.