Home / 1,390,297.11-1,918,451.43-778,364.79

Finding the Fourth Proportional to 1,390,297.11, 1,918,451.43 and 778,364.79

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Solution

The fourth proportional to 1,390,297.11, 1,918,451.43 and 778,364.79 is: 1,074,054.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,297.11 : 1,918,451.43 = 778,364.79 : x
  2. Step 2: Convert to fraction form
    1,390,297.11/1,918,451.43 = 778,364.79/x
  3. Step 3: Cross multiply
    1,390,297.11x = 1,918,451.43 × 778,364.79
  4. Step 4: Simplify right side
    1,390,297.11x = 1,493,255,044,437.15
  5. Step 5: Solve for x
    x = 1,493,255,044,437.15/1,390,297.11
  6. Step 6: Final answer
    x = 1,074,054.63

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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.