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Finding the Fourth Proportional to 519,343.60, 778,957.80 and 145,404.40

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Solution

The fourth proportional to 519,343.60, 778,957.80 and 145,404.40 is: 218,090.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,343.60 : 778,957.80 = 145,404.40 : x
  2. Step 2: Convert to fraction form
    519,343.60/778,957.80 = 145,404.40/x
  3. Step 3: Cross multiply
    519,343.60x = 778,957.80 × 145,404.40
  4. Step 4: Simplify right side
    519,343.60x = 113,263,891,534.32
  5. Step 5: Solve for x
    x = 113,263,891,534.32/519,343.60
  6. Step 6: Final answer
    x = 218,090.47

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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.