Home / 679,739.08-937,806.30-421,523.20

Finding the Fourth Proportional to 679,739.08, 937,806.30 and 421,523.20

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Solution

The fourth proportional to 679,739.08, 937,806.30 and 421,523.20 is: 581,557.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,739.08 : 937,806.30 = 421,523.20 : x
  2. Step 2: Convert to fraction form
    679,739.08/937,806.30 = 421,523.20/x
  3. Step 3: Cross multiply
    679,739.08x = 937,806.30 × 421,523.20
  4. Step 4: Simplify right side
    679,739.08x = 395,307,112,556.16
  5. Step 5: Solve for x
    x = 395,307,112,556.16/679,739.08
  6. Step 6: Final answer
    x = 581,557.14

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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.