Home / 645,335.90-890,585.18-354,959.75

Finding the Fourth Proportional to 645,335.90, 890,585.18 and 354,959.75

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Solution

The fourth proportional to 645,335.90, 890,585.18 and 354,959.75 is: 489,856.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,335.90 : 890,585.18 = 354,959.75 : x
  2. Step 2: Convert to fraction form
    645,335.90/890,585.18 = 354,959.75/x
  3. Step 3: Cross multiply
    645,335.90x = 890,585.18 × 354,959.75
  4. Step 4: Simplify right side
    645,335.90x = 316,121,892,846.51
  5. Step 5: Solve for x
    x = 316,121,892,846.51/645,335.90
  6. Step 6: Final answer
    x = 489,856.36

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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.