Home / 645,086.34-890,225.64-354,713.22

Finding the Fourth Proportional to 645,086.34, 890,225.64 and 354,713.22

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Solution

The fourth proportional to 645,086.34, 890,225.64 and 354,713.22 is: 489,507.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,086.34 : 890,225.64 = 354,713.22 : x
  2. Step 2: Convert to fraction form
    645,086.34/890,225.64 = 354,713.22/x
  3. Step 3: Cross multiply
    645,086.34x = 890,225.64 × 354,713.22
  4. Step 4: Simplify right side
    645,086.34x = 315,774,803,290.96
  5. Step 5: Solve for x
    x = 315,774,803,290.96/645,086.34
  6. Step 6: Final answer
    x = 489,507.81

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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.