Home / 921,230.78-1,381,714.94-290,128.18

Finding the Fourth Proportional to 921,230.78, 1,381,714.94 and 290,128.18

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Solution

The fourth proportional to 921,230.78, 1,381,714.94 and 290,128.18 is: 435,150.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,230.78 : 1,381,714.94 = 290,128.18 : x
  2. Step 2: Convert to fraction form
    921,230.78/1,381,714.94 = 290,128.18/x
  3. Step 3: Cross multiply
    921,230.78x = 1,381,714.94 × 290,128.18
  4. Step 4: Simplify right side
    921,230.78x = 400,874,440,821.01
  5. Step 5: Solve for x
    x = 400,874,440,821.01/921,230.78
  6. Step 6: Final answer
    x = 435,150.94

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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.