Home / 719,838.80-1,079,758.20-420,657.20

Finding the Fourth Proportional to 719,838.80, 1,079,758.20 and 420,657.20

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Solution

The fourth proportional to 719,838.80, 1,079,758.20 and 420,657.20 is: 630,985.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,838.80 : 1,079,758.20 = 420,657.20 : x
  2. Step 2: Convert to fraction form
    719,838.80/1,079,758.20 = 420,657.20/x
  3. Step 3: Cross multiply
    719,838.80x = 1,079,758.20 × 420,657.20
  4. Step 4: Simplify right side
    719,838.80x = 454,208,061,089.04
  5. Step 5: Solve for x
    x = 454,208,061,089.04/719,838.80
  6. Step 6: Final answer
    x = 630,985.80

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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.