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Finding the Fourth Proportional to 1,273,649.28, 1,908,899.28 and 642,743.52

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Solution

The fourth proportional to 1,273,649.28, 1,908,899.28 and 642,743.52 is: 963,320.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273,649.28 : 1,908,899.28 = 642,743.52 : x
  2. Step 2: Convert to fraction form
    1,273,649.28/1,908,899.28 = 642,743.52/x
  3. Step 3: Cross multiply
    1,273,649.28x = 1,908,899.28 × 642,743.52
  4. Step 4: Simplify right side
    1,273,649.28x = 1,226,932,642,552.67
  5. Step 5: Solve for x
    x = 1,226,932,642,552.67/1,273,649.28
  6. Step 6: Final answer
    x = 963,320.64

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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.