Home / 684,145.80-1,026,510.30-431,620.20

Finding the Fourth Proportional to 684,145.80, 1,026,510.30 and 431,620.20

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Solution

The fourth proportional to 684,145.80, 1,026,510.30 and 431,620.20 is: 647,614.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,145.80 : 1,026,510.30 = 431,620.20 : x
  2. Step 2: Convert to fraction form
    684,145.80/1,026,510.30 = 431,620.20/x
  3. Step 3: Cross multiply
    684,145.80x = 1,026,510.30 × 431,620.20
  4. Step 4: Simplify right side
    684,145.80x = 443,062,580,988.06
  5. Step 5: Solve for x
    x = 443,062,580,988.06/684,145.80
  6. Step 6: Final answer
    x = 647,614.27

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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.