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Finding the Fourth Proportional to 289,730.80, 434,596.20 and 79,368.40

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Solution

The fourth proportional to 289,730.80, 434,596.20 and 79,368.40 is: 119,052.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,730.80 : 434,596.20 = 79,368.40 : x
  2. Step 2: Convert to fraction form
    289,730.80/434,596.20 = 79,368.40/x
  3. Step 3: Cross multiply
    289,730.80x = 434,596.20 × 79,368.40
  4. Step 4: Simplify right side
    289,730.80x = 34,493,205,040.08
  5. Step 5: Solve for x
    x = 34,493,205,040.08/289,730.80
  6. Step 6: Final answer
    x = 119,052.60

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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.