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Finding the Fourth Proportional to 611,903.80, 917,491.20 and 375,416.20

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Solution

The fourth proportional to 611,903.80, 917,491.20 and 375,416.20 is: 562,900.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,903.80 : 917,491.20 = 375,416.20 : x
  2. Step 2: Convert to fraction form
    611,903.80/917,491.20 = 375,416.20/x
  3. Step 3: Cross multiply
    611,903.80x = 917,491.20 × 375,416.20
  4. Step 4: Simplify right side
    611,903.80x = 344,441,059,837.44
  5. Step 5: Solve for x
    x = 344,441,059,837.44/611,903.80
  6. Step 6: Final answer
    x = 562,900.67

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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.