Home / 1,390,674.26-1,919,039.10-778,686.72

Finding the Fourth Proportional to 1,390,674.26, 1,919,039.10 and 778,686.72

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Solution

The fourth proportional to 1,390,674.26, 1,919,039.10 and 778,686.72 is: 1,074,536.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,674.26 : 1,919,039.10 = 778,686.72 : x
  2. Step 2: Convert to fraction form
    1,390,674.26/1,919,039.10 = 778,686.72/x
  3. Step 3: Cross multiply
    1,390,674.26x = 1,919,039.10 × 778,686.72
  4. Step 4: Simplify right side
    1,390,674.26x = 1,494,330,262,330.75
  5. Step 5: Solve for x
    x = 1,494,330,262,330.75/1,390,674.26
  6. Step 6: Final answer
    x = 1,074,536.51

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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.