Home / 645,119.01-890,283.60-354,715.56

Finding the Fourth Proportional to 645,119.01, 890,283.60 and 354,715.56

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Solution

The fourth proportional to 645,119.01, 890,283.60 and 354,715.56 is: 489,518.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,119.01 : 890,283.60 = 354,715.56 : x
  2. Step 2: Convert to fraction form
    645,119.01/890,283.60 = 354,715.56/x
  3. Step 3: Cross multiply
    645,119.01x = 890,283.60 × 354,715.56
  4. Step 4: Simplify right side
    645,119.01x = 315,797,445,732.82
  5. Step 5: Solve for x
    x = 315,797,445,732.82/645,119.01
  6. Step 6: Final answer
    x = 489,518.12

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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.