Home / 1,987,688.64-2,743,043.52-1,128,275.28

Finding the Fourth Proportional to 1,987,688.64, 2,743,043.52 and 1,128,275.28

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Solution

The fourth proportional to 1,987,688.64, 2,743,043.52 and 1,128,275.28 is: 1,557,038.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987,688.64 : 2,743,043.52 = 1,128,275.28 : x
  2. Step 2: Convert to fraction form
    1,987,688.64/2,743,043.52 = 1,128,275.28/x
  3. Step 3: Cross multiply
    1,987,688.64x = 2,743,043.52 × 1,128,275.28
  4. Step 4: Simplify right side
    1,987,688.64x = 3,094,908,195,580.19
  5. Step 5: Solve for x
    x = 3,094,908,195,580.19/1,987,688.64
  6. Step 6: Final answer
    x = 1,557,038.73

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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.