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Finding the Fourth Proportional to 398,507.01, 549,936.09 and 217,218.93

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Solution

The fourth proportional to 398,507.01, 549,936.09 and 217,218.93 is: 299,760.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,507.01 : 549,936.09 = 217,218.93 : x
  2. Step 2: Convert to fraction form
    398,507.01/549,936.09 = 217,218.93/x
  3. Step 3: Cross multiply
    398,507.01x = 549,936.09 × 217,218.93
  4. Step 4: Simplify right side
    398,507.01x = 119,456,529,038.18
  5. Step 5: Solve for x
    x = 119,456,529,038.18/398,507.01
  6. Step 6: Final answer
    x = 299,760.17

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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.