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Finding the Fourth Proportional to 282,797.76, 390,263.15 and 153,736.21

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Solution

The fourth proportional to 282,797.76, 390,263.15 and 153,736.21 is: 212,157.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,797.76 : 390,263.15 = 153,736.21 : x
  2. Step 2: Convert to fraction form
    282,797.76/390,263.15 = 153,736.21/x
  3. Step 3: Cross multiply
    282,797.76x = 390,263.15 × 153,736.21
  4. Step 4: Simplify right side
    282,797.76x = 59,997,574,863.66
  5. Step 5: Solve for x
    x = 59,997,574,863.66/282,797.76
  6. Step 6: Final answer
    x = 212,157.18

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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.