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Finding the Fourth Proportional to 318,880.60, 478,320.90 and 306,633.40

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Solution

The fourth proportional to 318,880.60, 478,320.90 and 306,633.40 is: 459,950.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,880.60 : 478,320.90 = 306,633.40 : x
  2. Step 2: Convert to fraction form
    318,880.60/478,320.90 = 306,633.40/x
  3. Step 3: Cross multiply
    318,880.60x = 478,320.90 × 306,633.40
  4. Step 4: Simplify right side
    318,880.60x = 146,669,163,858.06
  5. Step 5: Solve for x
    x = 146,669,163,858.06/318,880.60
  6. Step 6: Final answer
    x = 459,950.10

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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.