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Finding the Fourth Proportional to 607,128.80, 909,964.20 and 417,588.80

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Solution

The fourth proportional to 607,128.80, 909,964.20 and 417,588.80 is: 625,881.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,128.80 : 909,964.20 = 417,588.80 : x
  2. Step 2: Convert to fraction form
    607,128.80/909,964.20 = 417,588.80/x
  3. Step 3: Cross multiply
    607,128.80x = 909,964.20 × 417,588.80
  4. Step 4: Simplify right side
    607,128.80x = 379,990,858,320.96
  5. Step 5: Solve for x
    x = 379,990,858,320.96/607,128.80
  6. Step 6: Final answer
    x = 625,881.79

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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.