Home / 990,863.57-1,485,915.05-421,883.93

Finding the Fourth Proportional to 990,863.57, 1,485,915.05 and 421,883.93

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Solution

The fourth proportional to 990,863.57, 1,485,915.05 and 421,883.93 is: 632,663.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,863.57 : 1,485,915.05 = 421,883.93 : x
  2. Step 2: Convert to fraction form
    990,863.57/1,485,915.05 = 421,883.93/x
  3. Step 3: Cross multiply
    990,863.57x = 1,485,915.05 × 421,883.93
  4. Step 4: Simplify right side
    990,863.57x = 626,883,671,401.15
  5. Step 5: Solve for x
    x = 626,883,671,401.15/990,863.57
  6. Step 6: Final answer
    x = 632,663.96

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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.