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Finding the Fourth Proportional to 265,428.40, 398,920.20 and 260,762.80

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Solution

The fourth proportional to 265,428.40, 398,920.20 and 260,762.80 is: 391,908.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,428.40 : 398,920.20 = 260,762.80 : x
  2. Step 2: Convert to fraction form
    265,428.40/398,920.20 = 260,762.80/x
  3. Step 3: Cross multiply
    265,428.40x = 398,920.20 × 260,762.80
  4. Step 4: Simplify right side
    265,428.40x = 104,023,548,328.56
  5. Step 5: Solve for x
    x = 104,023,548,328.56/265,428.40
  6. Step 6: Final answer
    x = 391,908.13

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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.