Home / 289,885.40-434,828.10-268,890.20

Finding the Fourth Proportional to 289,885.40, 434,828.10 and 268,890.20

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Solution

The fourth proportional to 289,885.40, 434,828.10 and 268,890.20 is: 403,335.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,885.40 : 434,828.10 = 268,890.20 : x
  2. Step 2: Convert to fraction form
    289,885.40/434,828.10 = 268,890.20/x
  3. Step 3: Cross multiply
    289,885.40x = 434,828.10 × 268,890.20
  4. Step 4: Simplify right side
    289,885.40x = 116,921,014,774.62
  5. Step 5: Solve for x
    x = 116,921,014,774.62/289,885.40
  6. Step 6: Final answer
    x = 403,335.30

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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.