Home / 1,389,089.60-2,085,016.80-679,918.40

Finding the Fourth Proportional to 1,389,089.60, 2,085,016.80 and 679,918.40

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Solution

The fourth proportional to 1,389,089.60, 2,085,016.80 and 679,918.40 is: 1,020,554.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,089.60 : 2,085,016.80 = 679,918.40 : x
  2. Step 2: Convert to fraction form
    1,389,089.60/2,085,016.80 = 679,918.40/x
  3. Step 3: Cross multiply
    1,389,089.60x = 2,085,016.80 × 679,918.40
  4. Step 4: Simplify right side
    1,389,089.60x = 1,417,641,286,629.12
  5. Step 5: Solve for x
    x = 1,417,641,286,629.12/1,389,089.60
  6. Step 6: Final answer
    x = 1,020,554.24

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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.