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Finding the Fourth Proportional to 518,419.36, 715,433.88 and 303,539.32

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Solution

The fourth proportional to 518,419.36, 715,433.88 and 303,539.32 is: 418,893.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,419.36 : 715,433.88 = 303,539.32 : x
  2. Step 2: Convert to fraction form
    518,419.36/715,433.88 = 303,539.32/x
  3. Step 3: Cross multiply
    518,419.36x = 715,433.88 × 303,539.32
  4. Step 4: Simplify right side
    518,419.36x = 217,162,313,440.16
  5. Step 5: Solve for x
    x = 217,162,313,440.16/518,419.36
  6. Step 6: Final answer
    x = 418,893.14

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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.