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Finding the Fourth Proportional to 518,410.40, 715,421.51 and 303,530.36

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Solution

The fourth proportional to 518,410.40, 715,421.51 and 303,530.36 is: 418,880.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,410.40 : 715,421.51 = 303,530.36 : x
  2. Step 2: Convert to fraction form
    518,410.40/715,421.51 = 303,530.36/x
  3. Step 3: Cross multiply
    518,410.40x = 715,421.51 × 303,530.36
  4. Step 4: Simplify right side
    518,410.40x = 217,152,143,387.28
  5. Step 5: Solve for x
    x = 217,152,143,387.28/518,410.40
  6. Step 6: Final answer
    x = 418,880.77

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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.