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Finding the Fourth Proportional to 438,343.60, 657,515.40 and 157,824.40

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Solution

The fourth proportional to 438,343.60, 657,515.40 and 157,824.40 is: 236,736.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,343.60 : 657,515.40 = 157,824.40 : x
  2. Step 2: Convert to fraction form
    438,343.60/657,515.40 = 157,824.40/x
  3. Step 3: Cross multiply
    438,343.60x = 657,515.40 × 157,824.40
  4. Step 4: Simplify right side
    438,343.60x = 103,771,973,495.76
  5. Step 5: Solve for x
    x = 103,771,973,495.76/438,343.60
  6. Step 6: Final answer
    x = 236,736.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.