Home / 642,617.15-886,921.45-370,636.36

Finding the Fourth Proportional to 642,617.15, 886,921.45 and 370,636.36

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Solution

The fourth proportional to 642,617.15, 886,921.45 and 370,636.36 is: 511,541.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,617.15 : 886,921.45 = 370,636.36 : x
  2. Step 2: Convert to fraction form
    642,617.15/886,921.45 = 370,636.36/x
  3. Step 3: Cross multiply
    642,617.15x = 886,921.45 × 370,636.36
  4. Step 4: Simplify right side
    642,617.15x = 328,725,334,690.03
  5. Step 5: Solve for x
    x = 328,725,334,690.03/642,617.15
  6. Step 6: Final answer
    x = 511,541.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.