Home / 645,937.56-891,485.46-387,826.20

Finding the Fourth Proportional to 645,937.56, 891,485.46 and 387,826.20

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Solution

The fourth proportional to 645,937.56, 891,485.46 and 387,826.20 is: 535,255.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,937.56 : 891,485.46 = 387,826.20 : x
  2. Step 2: Convert to fraction form
    645,937.56/891,485.46 = 387,826.20/x
  3. Step 3: Cross multiply
    645,937.56x = 891,485.46 × 387,826.20
  4. Step 4: Simplify right side
    645,937.56x = 345,741,418,307.05
  5. Step 5: Solve for x
    x = 345,741,418,307.05/645,937.56
  6. Step 6: Final answer
    x = 535,255.17

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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.