Home / 1,078,139.20-1,615,264.80-515,934.40

Finding the Fourth Proportional to 1,078,139.20, 1,615,264.80 and 515,934.40

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Solution

The fourth proportional to 1,078,139.20, 1,615,264.80 and 515,934.40 is: 772,971.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078,139.20 : 1,615,264.80 = 515,934.40 : x
  2. Step 2: Convert to fraction form
    1,078,139.20/1,615,264.80 = 515,934.40/x
  3. Step 3: Cross multiply
    1,078,139.20x = 1,615,264.80 × 515,934.40
  4. Step 4: Simplify right side
    1,078,139.20x = 833,370,675,429.12
  5. Step 5: Solve for x
    x = 833,370,675,429.12/1,078,139.20
  6. Step 6: Final answer
    x = 772,971.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.