Home / 1,390,639.20-2,084,520.51-790,307.70

Finding the Fourth Proportional to 1,390,639.20, 2,084,520.51 and 790,307.70

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Solution

The fourth proportional to 1,390,639.20, 2,084,520.51 and 790,307.70 is: 1,184,644.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,639.20 : 2,084,520.51 = 790,307.70 : x
  2. Step 2: Convert to fraction form
    1,390,639.20/2,084,520.51 = 790,307.70/x
  3. Step 3: Cross multiply
    1,390,639.20x = 2,084,520.51 × 790,307.70
  4. Step 4: Simplify right side
    1,390,639.20x = 1,647,412,609,860.93
  5. Step 5: Solve for x
    x = 1,647,412,609,860.93/1,390,639.20
  6. Step 6: Final answer
    x = 1,184,644.16

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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.