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Finding the Fourth Proportional to 289,012.40, 432,904.20 and 189,479.60

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Solution

The fourth proportional to 289,012.40, 432,904.20 and 189,479.60 is: 283,816.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,012.40 : 432,904.20 = 189,479.60 : x
  2. Step 2: Convert to fraction form
    289,012.40/432,904.20 = 189,479.60/x
  3. Step 3: Cross multiply
    289,012.40x = 432,904.20 × 189,479.60
  4. Step 4: Simplify right side
    289,012.40x = 82,026,514,654.32
  5. Step 5: Solve for x
    x = 82,026,514,654.32/289,012.40
  6. Step 6: Final answer
    x = 283,816.59

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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.