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Finding the Fourth Proportional to 1,366,921.57, 1,886,409.04 and 786,145.10

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Solution

The fourth proportional to 1,366,921.57, 1,886,409.04 and 786,145.10 is: 1,084,913.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,366,921.57 : 1,886,409.04 = 786,145.10 : x
  2. Step 2: Convert to fraction form
    1,366,921.57/1,886,409.04 = 786,145.10/x
  3. Step 3: Cross multiply
    1,366,921.57x = 1,886,409.04 × 786,145.10
  4. Step 4: Simplify right side
    1,366,921.57x = 1,482,991,223,391.70
  5. Step 5: Solve for x
    x = 1,482,991,223,391.70/1,366,921.57
  6. Step 6: Final answer
    x = 1,084,913.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.