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Finding the Fourth Proportional to 518,213.10, 715,117.23 and 317,009.10

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Solution

The fourth proportional to 518,213.10, 715,117.23 and 317,009.10 is: 437,462.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,213.10 : 715,117.23 = 317,009.10 : x
  2. Step 2: Convert to fraction form
    518,213.10/715,117.23 = 317,009.10/x
  3. Step 3: Cross multiply
    518,213.10x = 715,117.23 × 317,009.10
  4. Step 4: Simplify right side
    518,213.10x = 226,698,669,476.79
  5. Step 5: Solve for x
    x = 226,698,669,476.79/518,213.10
  6. Step 6: Final answer
    x = 437,462.25

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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.