Home / 1,272,018.28-1,908,115.74-430,285.48

Finding the Fourth Proportional to 1,272,018.28, 1,908,115.74 and 430,285.48

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Solution

The fourth proportional to 1,272,018.28, 1,908,115.74 and 430,285.48 is: 645,458.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272,018.28 : 1,908,115.74 = 430,285.48 : x
  2. Step 2: Convert to fraction form
    1,272,018.28/1,908,115.74 = 430,285.48/x
  3. Step 3: Cross multiply
    1,272,018.28x = 1,908,115.74 × 430,285.48
  4. Step 4: Simplify right side
    1,272,018.28x = 821,034,497,081.46
  5. Step 5: Solve for x
    x = 821,034,497,081.46/1,272,018.28
  6. Step 6: Final answer
    x = 645,458.10

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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.