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Finding the Fourth Proportional to 405,340.28, 605,042.14 and 357,458.30

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Solution

The fourth proportional to 405,340.28, 605,042.14 and 357,458.30 is: 533,569.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,340.28 : 605,042.14 = 357,458.30 : x
  2. Step 2: Convert to fraction form
    405,340.28/605,042.14 = 357,458.30/x
  3. Step 3: Cross multiply
    405,340.28x = 605,042.14 × 357,458.30
  4. Step 4: Simplify right side
    405,340.28x = 216,277,334,792.76
  5. Step 5: Solve for x
    x = 216,277,334,792.76/405,340.28
  6. Step 6: Final answer
    x = 533,569.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.