Home / 1,077,579.51-1,487,420.07-642,133.45

Finding the Fourth Proportional to 1,077,579.51, 1,487,420.07 and 642,133.45

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Solution

The fourth proportional to 1,077,579.51, 1,487,420.07 and 642,133.45 is: 886,358.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,077,579.51 : 1,487,420.07 = 642,133.45 : x
  2. Step 2: Convert to fraction form
    1,077,579.51/1,487,420.07 = 642,133.45/x
  3. Step 3: Cross multiply
    1,077,579.51x = 1,487,420.07 × 642,133.45
  4. Step 4: Simplify right side
    1,077,579.51x = 955,122,172,105.91
  5. Step 5: Solve for x
    x = 955,122,172,105.91/1,077,579.51
  6. Step 6: Final answer
    x = 886,358.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.