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Finding the Fourth Proportional to 288,900.54, 432,989.82 and 139,112.91

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Solution

The fourth proportional to 288,900.54, 432,989.82 and 139,112.91 is: 208,495.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,900.54 : 432,989.82 = 139,112.91 : x
  2. Step 2: Convert to fraction form
    288,900.54/432,989.82 = 139,112.91/x
  3. Step 3: Cross multiply
    288,900.54x = 432,989.82 × 139,112.91
  4. Step 4: Simplify right side
    288,900.54x = 60,234,473,860.58
  5. Step 5: Solve for x
    x = 60,234,473,860.58/288,900.54
  6. Step 6: Final answer
    x = 208,495.54

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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.