Home / 645,332.90-890,581.04-354,956.75

Finding the Fourth Proportional to 645,332.90, 890,581.04 and 354,956.75

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Solution

The fourth proportional to 645,332.90, 890,581.04 and 354,956.75 is: 489,852.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,332.90 : 890,581.04 = 354,956.75 : x
  2. Step 2: Convert to fraction form
    645,332.90/890,581.04 = 354,956.75/x
  3. Step 3: Cross multiply
    645,332.90x = 890,581.04 × 354,956.75
  4. Step 4: Simplify right side
    645,332.90x = 316,117,745,342.33
  5. Step 5: Solve for x
    x = 316,117,745,342.33/645,332.90
  6. Step 6: Final answer
    x = 489,852.21

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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.