Home / 645,152.74-890,314.24-354,783.02

Finding the Fourth Proportional to 645,152.74, 890,314.24 and 354,783.02

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Solution

The fourth proportional to 645,152.74, 890,314.24 and 354,783.02 is: 489,602.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,152.74 : 890,314.24 = 354,783.02 : x
  2. Step 2: Convert to fraction form
    645,152.74/890,314.24 = 354,783.02/x
  3. Step 3: Cross multiply
    645,152.74x = 890,314.24 × 354,783.02
  4. Step 4: Simplify right side
    645,152.74x = 315,868,374,816.21
  5. Step 5: Solve for x
    x = 315,868,374,816.21/645,152.74
  6. Step 6: Final answer
    x = 489,602.47

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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.