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Finding the Fourth Proportional to 289,886.80, 434,808.60 and 121,363.60

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Solution

The fourth proportional to 289,886.80, 434,808.60 and 121,363.60 is: 182,036.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,886.80 : 434,808.60 = 121,363.60 : x
  2. Step 2: Convert to fraction form
    289,886.80/434,808.60 = 121,363.60/x
  3. Step 3: Cross multiply
    289,886.80x = 434,808.60 × 121,363.60
  4. Step 4: Simplify right side
    289,886.80x = 52,769,937,006.96
  5. Step 5: Solve for x
    x = 52,769,937,006.96/289,886.80
  6. Step 6: Final answer
    x = 182,036.36

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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.