Home / 645,333.90-890,582.42-354,957.75

Finding the Fourth Proportional to 645,333.90, 890,582.42 and 354,957.75

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Solution

The fourth proportional to 645,333.90, 890,582.42 and 354,957.75 is: 489,853.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,333.90 : 890,582.42 = 354,957.75 : x
  2. Step 2: Convert to fraction form
    645,333.90/890,582.42 = 354,957.75/x
  3. Step 3: Cross multiply
    645,333.90x = 890,582.42 × 354,957.75
  4. Step 4: Simplify right side
    645,333.90x = 316,119,131,992.76
  5. Step 5: Solve for x
    x = 316,119,131,992.76/645,333.90
  6. Step 6: Final answer
    x = 489,853.60

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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.