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Finding the Fourth Proportional to 518,290.83, 715,213.76 and 291,921.75

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Solution

The fourth proportional to 518,290.83, 715,213.76 and 291,921.75 is: 402,836.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,290.83 : 715,213.76 = 291,921.75 : x
  2. Step 2: Convert to fraction form
    518,290.83/715,213.76 = 291,921.75/x
  3. Step 3: Cross multiply
    518,290.83x = 715,213.76 × 291,921.75
  4. Step 4: Simplify right side
    518,290.83x = 208,786,450,983.67
  5. Step 5: Solve for x
    x = 208,786,450,983.67/518,290.83
  6. Step 6: Final answer
    x = 402,836.48

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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.