Home / 1,389,218.40-2,084,518.80-790,639.20

Finding the Fourth Proportional to 1,389,218.40, 2,084,518.80 and 790,639.20

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Solution

The fourth proportional to 1,389,218.40, 2,084,518.80 and 790,639.20 is: 1,186,352.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,218.40 : 2,084,518.80 = 790,639.20 : x
  2. Step 2: Convert to fraction form
    1,389,218.40/2,084,518.80 = 790,639.20/x
  3. Step 3: Cross multiply
    1,389,218.40x = 2,084,518.80 × 790,639.20
  4. Step 4: Simplify right side
    1,389,218.40x = 1,648,102,276,416.96
  5. Step 5: Solve for x
    x = 1,648,102,276,416.96/1,389,218.40
  6. Step 6: Final answer
    x = 1,186,352.18

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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.