Home / 1,390,072.62-1,918,194.18-778,085.22

Finding the Fourth Proportional to 1,390,072.62, 1,918,194.18 and 778,085.22

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Solution

The fourth proportional to 1,390,072.62, 1,918,194.18 and 778,085.22 is: 1,073,698.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,072.62 : 1,918,194.18 = 778,085.22 : x
  2. Step 2: Convert to fraction form
    1,390,072.62/1,918,194.18 = 778,085.22/x
  3. Step 3: Cross multiply
    1,390,072.62x = 1,918,194.18 × 778,085.22
  4. Step 4: Simplify right side
    1,390,072.62x = 1,492,518,540,548.02
  5. Step 5: Solve for x
    x = 1,492,518,540,548.02/1,390,072.62
  6. Step 6: Final answer
    x = 1,073,698.25

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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.