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Finding the Fourth Proportional to 1,430,629.81, 1,974,263.16 and 786,048.01

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Solution

The fourth proportional to 1,430,629.81, 1,974,263.16 and 786,048.01 is: 1,084,742.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430,629.81 : 1,974,263.16 = 786,048.01 : x
  2. Step 2: Convert to fraction form
    1,430,629.81/1,974,263.16 = 786,048.01/x
  3. Step 3: Cross multiply
    1,430,629.81x = 1,974,263.16 × 786,048.01
  4. Step 4: Simplify right side
    1,430,629.81x = 1,551,865,628,134.31
  5. Step 5: Solve for x
    x = 1,551,865,628,134.31/1,430,629.81
  6. Step 6: Final answer
    x = 1,084,742.97

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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.