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Finding the Fourth Proportional to 604,897.80, 907,638.30 and 427,021.80

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Solution

The fourth proportional to 604,897.80, 907,638.30 and 427,021.80 is: 640,738.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,897.80 : 907,638.30 = 427,021.80 : x
  2. Step 2: Convert to fraction form
    604,897.80/907,638.30 = 427,021.80/x
  3. Step 3: Cross multiply
    604,897.80x = 907,638.30 × 427,021.80
  4. Step 4: Simplify right side
    604,897.80x = 387,581,340,614.94
  5. Step 5: Solve for x
    x = 387,581,340,614.94/604,897.80
  6. Step 6: Final answer
    x = 640,738.55

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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.