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Finding the Fourth Proportional to 312,503.46, 468,130.78 and 143,792.47

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Solution

The fourth proportional to 312,503.46, 468,130.78 and 143,792.47 is: 215,401.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,503.46 : 468,130.78 = 143,792.47 : x
  2. Step 2: Convert to fraction form
    312,503.46/468,130.78 = 143,792.47/x
  3. Step 3: Cross multiply
    312,503.46x = 468,130.78 × 143,792.47
  4. Step 4: Simplify right side
    312,503.46x = 67,313,681,139.23
  5. Step 5: Solve for x
    x = 67,313,681,139.23/312,503.46
  6. Step 6: Final answer
    x = 215,401.39

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1.5x scale

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.