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Finding the Fourth Proportional to 290,358.78, 435,368.62 and 112,658.24

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Solution

The fourth proportional to 290,358.78, 435,368.62 and 112,658.24 is: 168,921.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,358.78 : 435,368.62 = 112,658.24 : x
  2. Step 2: Convert to fraction form
    290,358.78/435,368.62 = 112,658.24/x
  3. Step 3: Cross multiply
    290,358.78x = 435,368.62 × 112,658.24
  4. Step 4: Simplify right side
    290,358.78x = 49,047,863,709.67
  5. Step 5: Solve for x
    x = 49,047,863,709.67/290,358.78
  6. Step 6: Final answer
    x = 168,921.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.