Home / 645,460.88-890,731.07-355,066.18

Finding the Fourth Proportional to 645,460.88, 890,731.07 and 355,066.18

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Solution

The fourth proportional to 645,460.88, 890,731.07 and 355,066.18 is: 489,988.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,460.88 : 890,731.07 = 355,066.18 : x
  2. Step 2: Convert to fraction form
    645,460.88/890,731.07 = 355,066.18/x
  3. Step 3: Cross multiply
    645,460.88x = 890,731.07 × 355,066.18
  4. Step 4: Simplify right side
    645,460.88x = 316,268,478,432.21
  5. Step 5: Solve for x
    x = 316,268,478,432.21/645,460.88
  6. Step 6: Final answer
    x = 489,988.61

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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.