Home / 645,750.25-891,143.51-355,395.24

Finding the Fourth Proportional to 645,750.25, 891,143.51 and 355,395.24

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Solution

The fourth proportional to 645,750.25, 891,143.51 and 355,395.24 is: 490,449.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,750.25 : 891,143.51 = 355,395.24 : x
  2. Step 2: Convert to fraction form
    645,750.25/891,143.51 = 355,395.24/x
  3. Step 3: Cross multiply
    645,750.25x = 891,143.51 × 355,395.24
  4. Step 4: Simplify right side
    645,750.25x = 316,708,155,378.20
  5. Step 5: Solve for x
    x = 316,708,155,378.20/645,750.25
  6. Step 6: Final answer
    x = 490,449.92

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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.