Home / 718,042.15-990,904.20-395,753.07

Finding the Fourth Proportional to 718,042.15, 990,904.20 and 395,753.07

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Solution

The fourth proportional to 718,042.15, 990,904.20 and 395,753.07 is: 546,142.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,042.15 : 990,904.20 = 395,753.07 : x
  2. Step 2: Convert to fraction form
    718,042.15/990,904.20 = 395,753.07/x
  3. Step 3: Cross multiply
    718,042.15x = 990,904.20 × 395,753.07
  4. Step 4: Simplify right side
    718,042.15x = 392,153,379,225.89
  5. Step 5: Solve for x
    x = 392,153,379,225.89/718,042.15
  6. Step 6: Final answer
    x = 546,142.56

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1.5x scale

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.