Home / 1,389,955.77-1,918,124.31-778,113.56

Finding the Fourth Proportional to 1,389,955.77, 1,918,124.31 and 778,113.56

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Solution

The fourth proportional to 1,389,955.77, 1,918,124.31 and 778,113.56 is: 1,073,788.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,955.77 : 1,918,124.31 = 778,113.56 : x
  2. Step 2: Convert to fraction form
    1,389,955.77/1,918,124.31 = 778,113.56/x
  3. Step 3: Cross multiply
    1,389,955.77x = 1,918,124.31 × 778,113.56
  4. Step 4: Simplify right side
    1,389,955.77x = 1,492,518,537,254.03
  5. Step 5: Solve for x
    x = 1,492,518,537,254.03/1,389,955.77
  6. Step 6: Final answer
    x = 1,073,788.51

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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.