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Finding the Fourth Proportional to 670,137.81, 924,924.69 and 398,153.34

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Solution

The fourth proportional to 670,137.81, 924,924.69 and 398,153.34 is: 549,531.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,137.81 : 924,924.69 = 398,153.34 : x
  2. Step 2: Convert to fraction form
    670,137.81/924,924.69 = 398,153.34/x
  3. Step 3: Cross multiply
    670,137.81x = 924,924.69 × 398,153.34
  4. Step 4: Simplify right side
    670,137.81x = 368,261,854,571.97
  5. Step 5: Solve for x
    x = 368,261,854,571.97/670,137.81
  6. Step 6: Final answer
    x = 549,531.53

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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.