Home / 645,263.70-890,474.09-354,887.88

Finding the Fourth Proportional to 645,263.70, 890,474.09 and 354,887.88

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Solution

The fourth proportional to 645,263.70, 890,474.09 and 354,887.88 is: 489,750.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,263.70 : 890,474.09 = 354,887.88 : x
  2. Step 2: Convert to fraction form
    645,263.70/890,474.09 = 354,887.88/x
  3. Step 3: Cross multiply
    645,263.70x = 890,474.09 × 354,887.88
  4. Step 4: Simplify right side
    645,263.70x = 316,018,460,220.59
  5. Step 5: Solve for x
    x = 316,018,460,220.59/645,263.70
  6. Step 6: Final answer
    x = 489,750.87

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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.