Home / 645,486.28-890,159.67-412,986.78

Finding the Fourth Proportional to 645,486.28, 890,159.67 and 412,986.78

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Solution

The fourth proportional to 645,486.28, 890,159.67 and 412,986.78 is: 569,530.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,486.28 : 890,159.67 = 412,986.78 : x
  2. Step 2: Convert to fraction form
    645,486.28/890,159.67 = 412,986.78/x
  3. Step 3: Cross multiply
    645,486.28x = 890,159.67 × 412,986.78
  4. Step 4: Simplify right side
    645,486.28x = 367,624,180,360.46
  5. Step 5: Solve for x
    x = 367,624,180,360.46/645,486.28
  6. Step 6: Final answer
    x = 569,530.59

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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.