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Finding the Fourth Proportional to 280,783.73, 387,475.85 and 153,460.24

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Solution

The fourth proportional to 280,783.73, 387,475.85 and 153,460.24 is: 211,772.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,783.73 : 387,475.85 = 153,460.24 : x
  2. Step 2: Convert to fraction form
    280,783.73/387,475.85 = 153,460.24/x
  3. Step 3: Cross multiply
    280,783.73x = 387,475.85 × 153,460.24
  4. Step 4: Simplify right side
    280,783.73x = 59,462,136,350.17
  5. Step 5: Solve for x
    x = 59,462,136,350.17/280,783.73
  6. Step 6: Final answer
    x = 211,772.01

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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.