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Finding the Fourth Proportional to 282,690.68, 390,057.53 and 168,004.40

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Solution

The fourth proportional to 282,690.68, 390,057.53 and 168,004.40 is: 231,813.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,690.68 : 390,057.53 = 168,004.40 : x
  2. Step 2: Convert to fraction form
    282,690.68/390,057.53 = 168,004.40/x
  3. Step 3: Cross multiply
    282,690.68x = 390,057.53 × 168,004.40
  4. Step 4: Simplify right side
    282,690.68x = 65,531,378,502.82
  5. Step 5: Solve for x
    x = 65,531,378,502.82/282,690.68
  6. Step 6: Final answer
    x = 231,813.02

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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.