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Finding the Fourth Proportional to 518,832.68, 715,880.23 and 314,990.91

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Solution

The fourth proportional to 518,832.68, 715,880.23 and 314,990.91 is: 434,621.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,832.68 : 715,880.23 = 314,990.91 : x
  2. Step 2: Convert to fraction form
    518,832.68/715,880.23 = 314,990.91/x
  3. Step 3: Cross multiply
    518,832.68x = 715,880.23 × 314,990.91
  4. Step 4: Simplify right side
    518,832.68x = 225,495,764,311.23
  5. Step 5: Solve for x
    x = 225,495,764,311.23/518,832.68
  6. Step 6: Final answer
    x = 434,621.36

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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.