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Finding the Fourth Proportional to 417,903.40, 626,855.10 and 122,415.40

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Solution

The fourth proportional to 417,903.40, 626,855.10 and 122,415.40 is: 183,623.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,903.40 : 626,855.10 = 122,415.40 : x
  2. Step 2: Convert to fraction form
    417,903.40/626,855.10 = 122,415.40/x
  3. Step 3: Cross multiply
    417,903.40x = 626,855.10 × 122,415.40
  4. Step 4: Simplify right side
    417,903.40x = 76,736,717,808.54
  5. Step 5: Solve for x
    x = 76,736,717,808.54/417,903.40
  6. Step 6: Final answer
    x = 183,623.10

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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.