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Finding the Fourth Proportional to 518,172.93, 715,080.09 and 300,423.92

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Solution

The fourth proportional to 518,172.93, 715,080.09 and 300,423.92 is: 414,585.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,172.93 : 715,080.09 = 300,423.92 : x
  2. Step 2: Convert to fraction form
    518,172.93/715,080.09 = 300,423.92/x
  3. Step 3: Cross multiply
    518,172.93x = 715,080.09 × 300,423.92
  4. Step 4: Simplify right side
    518,172.93x = 214,827,160,176.35
  5. Step 5: Solve for x
    x = 214,827,160,176.35/518,172.93
  6. Step 6: Final answer
    x = 414,585.84

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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.