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Finding the Fourth Proportional to 640,984.74, 884,554.47 and 354,494.22

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Solution

The fourth proportional to 640,984.74, 884,554.47 and 354,494.22 is: 489,199.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,984.74 : 884,554.47 = 354,494.22 : x
  2. Step 2: Convert to fraction form
    640,984.74/884,554.47 = 354,494.22/x
  3. Step 3: Cross multiply
    640,984.74x = 884,554.47 × 354,494.22
  4. Step 4: Simplify right side
    640,984.74x = 313,569,446,890.16
  5. Step 5: Solve for x
    x = 313,569,446,890.16/640,984.74
  6. Step 6: Final answer
    x = 489,199.55

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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.