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Finding the Fourth Proportional to 570,306.15, 786,940.11 and 315,656.73

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Solution

The fourth proportional to 570,306.15, 786,940.11 and 315,656.73 is: 435,560.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,306.15 : 786,940.11 = 315,656.73 : x
  2. Step 2: Convert to fraction form
    570,306.15/786,940.11 = 315,656.73/x
  3. Step 3: Cross multiply
    570,306.15x = 786,940.11 × 315,656.73
  4. Step 4: Simplify right side
    570,306.15x = 248,402,941,828.44
  5. Step 5: Solve for x
    x = 248,402,941,828.44/570,306.15
  6. Step 6: Final answer
    x = 435,560.69

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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.