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Finding the Fourth Proportional to 2,339,742.78, 3,509,738.82 and 742,430.88

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Solution

The fourth proportional to 2,339,742.78, 3,509,738.82 and 742,430.88 is: 1,113,685.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,339,742.78 : 3,509,738.82 = 742,430.88 : x
  2. Step 2: Convert to fraction form
    2,339,742.78/3,509,738.82 = 742,430.88/x
  3. Step 3: Cross multiply
    2,339,742.78x = 3,509,738.82 × 742,430.88
  4. Step 4: Simplify right side
    2,339,742.78x = 2,605,738,480,702.76
  5. Step 5: Solve for x
    x = 2,605,738,480,702.76/2,339,742.78
  6. Step 6: Final answer
    x = 1,113,685.87

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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.