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Finding the Fourth Proportional to 604,904.80, 907,648.80 and 427,028.80

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Solution

The fourth proportional to 604,904.80, 907,648.80 and 427,028.80 is: 640,749.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,904.80 : 907,648.80 = 427,028.80 : x
  2. Step 2: Convert to fraction form
    604,904.80/907,648.80 = 427,028.80/x
  3. Step 3: Cross multiply
    604,904.80x = 907,648.80 × 427,028.80
  4. Step 4: Simplify right side
    604,904.80x = 387,592,177,885.44
  5. Step 5: Solve for x
    x = 387,592,177,885.44/604,904.80
  6. Step 6: Final answer
    x = 640,749.05

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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.