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Finding the Fourth Proportional to 718,431.81, 991,502.42 and 412,548.27

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Solution

The fourth proportional to 718,431.81, 991,502.42 and 412,548.27 is: 569,354.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,431.81 : 991,502.42 = 412,548.27 : x
  2. Step 2: Convert to fraction form
    718,431.81/991,502.42 = 412,548.27/x
  3. Step 3: Cross multiply
    718,431.81x = 991,502.42 × 412,548.27
  4. Step 4: Simplify right side
    718,431.81x = 409,042,606,009.07
  5. Step 5: Solve for x
    x = 409,042,606,009.07/718,431.81
  6. Step 6: Final answer
    x = 569,354.81

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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.