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Finding the Fourth Proportional to 570,506.70, 787,352.06 and 315,857.88

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Solution

The fourth proportional to 570,506.70, 787,352.06 and 315,857.88 is: 435,913.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,506.70 : 787,352.06 = 315,857.88 : x
  2. Step 2: Convert to fraction form
    570,506.70/787,352.06 = 315,857.88/x
  3. Step 3: Cross multiply
    570,506.70x = 787,352.06 × 315,857.88
  4. Step 4: Simplify right side
    570,506.70x = 248,691,352,485.23
  5. Step 5: Solve for x
    x = 248,691,352,485.23/570,506.70
  6. Step 6: Final answer
    x = 435,913.11

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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.