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Finding the Fourth Proportional to 368,637.57, 553,089.50 and 128,786.88

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Solution

The fourth proportional to 368,637.57, 553,089.50 and 128,786.88 is: 193,226.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,637.57 : 553,089.50 = 128,786.88 : x
  2. Step 2: Convert to fraction form
    368,637.57/553,089.50 = 128,786.88/x
  3. Step 3: Cross multiply
    368,637.57x = 553,089.50 × 128,786.88
  4. Step 4: Simplify right side
    368,637.57x = 71,230,671,065.76
  5. Step 5: Solve for x
    x = 71,230,671,065.76/368,637.57
  6. Step 6: Final answer
    x = 193,226.84

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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.