Home / 687,323.31-1,031,078.67-399,270.30

Finding the Fourth Proportional to 687,323.31, 1,031,078.67 and 399,270.30

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Solution

The fourth proportional to 687,323.31, 1,031,078.67 and 399,270.30 is: 598,959.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,323.31 : 1,031,078.67 = 399,270.30 : x
  2. Step 2: Convert to fraction form
    687,323.31/1,031,078.67 = 399,270.30/x
  3. Step 3: Cross multiply
    687,323.31x = 1,031,078.67 × 399,270.30
  4. Step 4: Simplify right side
    687,323.31x = 411,679,089,894.50
  5. Step 5: Solve for x
    x = 411,679,089,894.50/687,323.31
  6. Step 6: Final answer
    x = 598,959.88

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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.