Home / 645,341.19-890,592.39-354,965.01

Finding the Fourth Proportional to 645,341.19, 890,592.39 and 354,965.01

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Solution

The fourth proportional to 645,341.19, 890,592.39 and 354,965.01 is: 489,863.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,341.19 : 890,592.39 = 354,965.01 : x
  2. Step 2: Convert to fraction form
    645,341.19/890,592.39 = 354,965.01/x
  3. Step 3: Cross multiply
    645,341.19x = 890,592.39 × 354,965.01
  4. Step 4: Simplify right side
    645,341.19x = 316,129,136,622.27
  5. Step 5: Solve for x
    x = 316,129,136,622.27/645,341.19
  6. Step 6: Final answer
    x = 489,863.57

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Double scale
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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.