Home / 645,359.50-890,617.92-354,983.44

Finding the Fourth Proportional to 645,359.50, 890,617.92 and 354,983.44

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Solution

The fourth proportional to 645,359.50, 890,617.92 and 354,983.44 is: 489,889.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,359.50 : 890,617.92 = 354,983.44 : x
  2. Step 2: Convert to fraction form
    645,359.50/890,617.92 = 354,983.44/x
  3. Step 3: Cross multiply
    645,359.50x = 890,617.92 × 354,983.44
  4. Step 4: Simplify right side
    645,359.50x = 316,154,612,967.25
  5. Step 5: Solve for x
    x = 316,154,612,967.25/645,359.50
  6. Step 6: Final answer
    x = 489,889.14

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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.