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Finding the Fourth Proportional to 1,389,429, 1,917,412.02 and 785,804.04

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Solution

The fourth proportional to 1,389,429, 1,917,412.02 and 785,804.04 is: 1,084,409.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,429 : 1,917,412.02 = 785,804.04 : x
  2. Step 2: Convert to fraction form
    1,389,429/1,917,412.02 = 785,804.04/x
  3. Step 3: Cross multiply
    1,389,429x = 1,917,412.02 × 785,804.04
  4. Step 4: Simplify right side
    1,389,429x = 1,506,710,111,660.56
  5. Step 5: Solve for x
    x = 1,506,710,111,660.56/1,389,429
  6. Step 6: Final answer
    x = 1,084,409.58

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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.