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Finding the Fourth Proportional to 570,705.80, 787,588.25 and 312,596.87

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Solution

The fourth proportional to 570,705.80, 787,588.25 and 312,596.87 is: 431,391.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,705.80 : 787,588.25 = 312,596.87 : x
  2. Step 2: Convert to fraction form
    570,705.80/787,588.25 = 312,596.87/x
  3. Step 3: Cross multiply
    570,705.80x = 787,588.25 × 312,596.87
  4. Step 4: Simplify right side
    570,705.80x = 246,197,616,297.85
  5. Step 5: Solve for x
    x = 246,197,616,297.85/570,705.80
  6. Step 6: Final answer
    x = 431,391.48

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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.