Home / 1,389,061.60-2,084,974.80-679,890.40

Finding the Fourth Proportional to 1,389,061.60, 2,084,974.80 and 679,890.40

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Solution

The fourth proportional to 1,389,061.60, 2,084,974.80 and 679,890.40 is: 1,020,512.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,061.60 : 2,084,974.80 = 679,890.40 : x
  2. Step 2: Convert to fraction form
    1,389,061.60/2,084,974.80 = 679,890.40/x
  3. Step 3: Cross multiply
    1,389,061.60x = 2,084,974.80 × 679,890.40
  4. Step 4: Simplify right side
    1,389,061.60x = 1,417,554,350,761.92
  5. Step 5: Solve for x
    x = 1,417,554,350,761.92/1,389,061.60
  6. Step 6: Final answer
    x = 1,020,512.23

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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.