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Finding the Fourth Proportional to 1,008,707, 1,392,015.66 and 556,007.72

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Solution

The fourth proportional to 1,008,707, 1,392,015.66 and 556,007.72 is: 767,290.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008,707 : 1,392,015.66 = 556,007.72 : x
  2. Step 2: Convert to fraction form
    1,008,707/1,392,015.66 = 556,007.72/x
  3. Step 3: Cross multiply
    1,008,707x = 1,392,015.66 × 556,007.72
  4. Step 4: Simplify right side
    1,008,707x = 773,971,453,320.90
  5. Step 5: Solve for x
    x = 773,971,453,320.90/1,008,707
  6. Step 6: Final answer
    x = 767,290.65

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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.