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Finding the Fourth Proportional to 611,793.95, 917,784.27 and 312,111.09

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Solution

The fourth proportional to 611,793.95, 917,784.27 and 312,111.09 is: 468,214.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,793.95 : 917,784.27 = 312,111.09 : x
  2. Step 2: Convert to fraction form
    611,793.95/917,784.27 = 312,111.09/x
  3. Step 3: Cross multiply
    611,793.95x = 917,784.27 × 312,111.09
  4. Step 4: Simplify right side
    611,793.95x = 286,450,648,894.55
  5. Step 5: Solve for x
    x = 286,450,648,894.55/611,793.95
  6. Step 6: Final answer
    x = 468,214.26

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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.