Home / 645,141.94-890,318.70-354,775.63

Finding the Fourth Proportional to 645,141.94, 890,318.70 and 354,775.63

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Solution

The fourth proportional to 645,141.94, 890,318.70 and 354,775.63 is: 489,602.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,141.94 : 890,318.70 = 354,775.63 : x
  2. Step 2: Convert to fraction form
    645,141.94/890,318.70 = 354,775.63/x
  3. Step 3: Cross multiply
    645,141.94x = 890,318.70 × 354,775.63
  4. Step 4: Simplify right side
    645,141.94x = 315,863,377,693.28
  5. Step 5: Solve for x
    x = 315,863,377,693.28/645,141.94
  6. Step 6: Final answer
    x = 489,602.92

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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.