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Finding the Fourth Proportional to 587,764.40, 879,803.40 and 421,876.40

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Solution

The fourth proportional to 587,764.40, 879,803.40 and 421,876.40 is: 631,491.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,764.40 : 879,803.40 = 421,876.40 : x
  2. Step 2: Convert to fraction form
    587,764.40/879,803.40 = 421,876.40/x
  3. Step 3: Cross multiply
    587,764.40x = 879,803.40 × 421,876.40
  4. Step 4: Simplify right side
    587,764.40x = 371,168,291,099.76
  5. Step 5: Solve for x
    x = 371,168,291,099.76/587,764.40
  6. Step 6: Final answer
    x = 631,491.62

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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.