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Finding the Fourth Proportional to 382,416.87, 528,274.94 and 306,440.67

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Solution

The fourth proportional to 382,416.87, 528,274.94 and 306,440.67 is: 423,320.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,416.87 : 528,274.94 = 306,440.67 : x
  2. Step 2: Convert to fraction form
    382,416.87/528,274.94 = 306,440.67/x
  3. Step 3: Cross multiply
    382,416.87x = 528,274.94 × 306,440.67
  4. Step 4: Simplify right side
    382,416.87x = 161,884,925,025.61
  5. Step 5: Solve for x
    x = 161,884,925,025.61/382,416.87
  6. Step 6: Final answer
    x = 423,320.56

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1.5x scale

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.