Home / 1,123,276.70-1,684,915.05-990,416.45

Finding the Fourth Proportional to 1,123,276.70, 1,684,915.05 and 990,416.45

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Solution

The fourth proportional to 1,123,276.70, 1,684,915.05 and 990,416.45 is: 1,485,624.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123,276.70 : 1,684,915.05 = 990,416.45 : x
  2. Step 2: Convert to fraction form
    1,123,276.70/1,684,915.05 = 990,416.45/x
  3. Step 3: Cross multiply
    1,123,276.70x = 1,684,915.05 × 990,416.45
  4. Step 4: Simplify right side
    1,123,276.70x = 1,668,767,582,372.57
  5. Step 5: Solve for x
    x = 1,668,767,582,372.57/1,123,276.70
  6. Step 6: Final answer
    x = 1,485,624.68

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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.