Home / 1,390,143.96-1,917,952.56-778,206.60

Finding the Fourth Proportional to 1,390,143.96, 1,917,952.56 and 778,206.60

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Solution

The fourth proportional to 1,390,143.96, 1,917,952.56 and 778,206.60 is: 1,073,675.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,143.96 : 1,917,952.56 = 778,206.60 : x
  2. Step 2: Convert to fraction form
    1,390,143.96/1,917,952.56 = 778,206.60/x
  3. Step 3: Cross multiply
    1,390,143.96x = 1,917,952.56 × 778,206.60
  4. Step 4: Simplify right side
    1,390,143.96x = 1,492,563,340,678.90
  5. Step 5: Solve for x
    x = 1,492,563,340,678.90/1,390,143.96
  6. Step 6: Final answer
    x = 1,073,675.38

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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.