Home / 645,174.93-890,364.30-354,808.57

Finding the Fourth Proportional to 645,174.93, 890,364.30 and 354,808.57

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Solution

The fourth proportional to 645,174.93, 890,364.30 and 354,808.57 is: 489,648.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,174.93 : 890,364.30 = 354,808.57 : x
  2. Step 2: Convert to fraction form
    645,174.93/890,364.30 = 354,808.57/x
  3. Step 3: Cross multiply
    645,174.93x = 890,364.30 × 354,808.57
  4. Step 4: Simplify right side
    645,174.93x = 315,908,884,062.05
  5. Step 5: Solve for x
    x = 315,908,884,062.05/645,174.93
  6. Step 6: Final answer
    x = 489,648.42

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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.