Home / 645,600.74-890,935.86-355,216.12

Finding the Fourth Proportional to 645,600.74, 890,935.86 and 355,216.12

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Solution

The fourth proportional to 645,600.74, 890,935.86 and 355,216.12 is: 490,202.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,600.74 : 890,935.86 = 355,216.12 : x
  2. Step 2: Convert to fraction form
    645,600.74/890,935.86 = 355,216.12/x
  3. Step 3: Cross multiply
    645,600.74x = 890,935.86 × 355,216.12
  4. Step 4: Simplify right side
    645,600.74x = 316,474,779,358.06
  5. Step 5: Solve for x
    x = 316,474,779,358.06/645,600.74
  6. Step 6: Final answer
    x = 490,202.01

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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.