Home / 817,987.28-1,128,800.48-455,411.36

Finding the Fourth Proportional to 817,987.28, 1,128,800.48 and 455,411.36

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Solution

The fourth proportional to 817,987.28, 1,128,800.48 and 455,411.36 is: 628,455.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,987.28 : 1,128,800.48 = 455,411.36 : x
  2. Step 2: Convert to fraction form
    817,987.28/1,128,800.48 = 455,411.36/x
  3. Step 3: Cross multiply
    817,987.28x = 1,128,800.48 × 455,411.36
  4. Step 4: Simplify right side
    817,987.28x = 514,068,561,765.45
  5. Step 5: Solve for x
    x = 514,068,561,765.45/817,987.28
  6. Step 6: Final answer
    x = 628,455.45

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1.5x scale

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.