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Finding the Fourth Proportional to 421,395.35, 581,683.71 and 276,210.48

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Solution

The fourth proportional to 421,395.35, 581,683.71 and 276,210.48 is: 381,274.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,395.35 : 581,683.71 = 276,210.48 : x
  2. Step 2: Convert to fraction form
    421,395.35/581,683.71 = 276,210.48/x
  3. Step 3: Cross multiply
    421,395.35x = 581,683.71 × 276,210.48
  4. Step 4: Simplify right side
    421,395.35x = 160,667,136,747.28
  5. Step 5: Solve for x
    x = 160,667,136,747.28/421,395.35
  6. Step 6: Final answer
    x = 381,274.11

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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.