Home / 821,498.42-1,229,975.31-421,276.34

Finding the Fourth Proportional to 821,498.42, 1,229,975.31 and 421,276.34

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Solution

The fourth proportional to 821,498.42, 1,229,975.31 and 421,276.34 is: 630,749.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,498.42 : 1,229,975.31 = 421,276.34 : x
  2. Step 2: Convert to fraction form
    821,498.42/1,229,975.31 = 421,276.34/x
  3. Step 3: Cross multiply
    821,498.42x = 1,229,975.31 × 421,276.34
  4. Step 4: Simplify right side
    821,498.42x = 518,159,496,887.17
  5. Step 5: Solve for x
    x = 518,159,496,887.17/821,498.42
  6. Step 6: Final answer
    x = 630,749.23

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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.