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Finding the Fourth Proportional to 1,219,731, 1,683,228.78 and 742,803

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Solution

The fourth proportional to 1,219,731, 1,683,228.78 and 742,803 is: 1,025,068.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219,731 : 1,683,228.78 = 742,803 : x
  2. Step 2: Convert to fraction form
    1,219,731/1,683,228.78 = 742,803/x
  3. Step 3: Cross multiply
    1,219,731x = 1,683,228.78 × 742,803
  4. Step 4: Simplify right side
    1,219,731x = 1,250,307,387,470.34
  5. Step 5: Solve for x
    x = 1,250,307,387,470.34/1,219,731
  6. Step 6: Final answer
    x = 1,025,068.14

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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.