Home / 1,220,194.72-1,830,211.72-421,487.68

Finding the Fourth Proportional to 1,220,194.72, 1,830,211.72 and 421,487.68

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Solution

The fourth proportional to 1,220,194.72, 1,830,211.72 and 421,487.68 is: 632,203.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220,194.72 : 1,830,211.72 = 421,487.68 : x
  2. Step 2: Convert to fraction form
    1,220,194.72/1,830,211.72 = 421,487.68/x
  3. Step 3: Cross multiply
    1,220,194.72x = 1,830,211.72 × 421,487.68
  4. Step 4: Simplify right side
    1,220,194.72x = 771,411,691,771.61
  5. Step 5: Solve for x
    x = 771,411,691,771.61/1,220,194.72
  6. Step 6: Final answer
    x = 632,203.76

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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.