Home / 990,040.66-1,485,685.72-421,420.88

Finding the Fourth Proportional to 990,040.66, 1,485,685.72 and 421,420.88

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Solution

The fourth proportional to 990,040.66, 1,485,685.72 and 421,420.88 is: 632,397.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,040.66 : 1,485,685.72 = 421,420.88 : x
  2. Step 2: Convert to fraction form
    990,040.66/1,485,685.72 = 421,420.88/x
  3. Step 3: Cross multiply
    990,040.66x = 1,485,685.72 × 421,420.88
  4. Step 4: Simplify right side
    990,040.66x = 626,098,977,039.35
  5. Step 5: Solve for x
    x = 626,098,977,039.35/990,040.66
  6. Step 6: Final answer
    x = 632,397.24

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1.5x scale

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.