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Finding the Fourth Proportional to 879,803.52, 1,319,728.21 and 280,763.87

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Solution

The fourth proportional to 879,803.52, 1,319,728.21 and 280,763.87 is: 421,153.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,803.52 : 1,319,728.21 = 280,763.87 : x
  2. Step 2: Convert to fraction form
    879,803.52/1,319,728.21 = 280,763.87/x
  3. Step 3: Cross multiply
    879,803.52x = 1,319,728.21 × 280,763.87
  4. Step 4: Simplify right side
    879,803.52x = 370,531,999,587.77
  5. Step 5: Solve for x
    x = 370,531,999,587.77/879,803.52
  6. Step 6: Final answer
    x = 421,153.12

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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.