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Finding the Fourth Proportional to 874,912.10, 1,312,368.15 and 748,940.90

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Solution

The fourth proportional to 874,912.10, 1,312,368.15 and 748,940.90 is: 1,123,411.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,912.10 : 1,312,368.15 = 748,940.90 : x
  2. Step 2: Convert to fraction form
    874,912.10/1,312,368.15 = 748,940.90/x
  3. Step 3: Cross multiply
    874,912.10x = 1,312,368.15 × 748,940.90
  4. Step 4: Simplify right side
    874,912.10x = 982,886,183,392.34
  5. Step 5: Solve for x
    x = 982,886,183,392.34/874,912.10
  6. Step 6: Final answer
    x = 1,123,411.35

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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.