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Finding the Fourth Proportional to 570,423.39, 787,193.60 and 312,296.03

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Solution

The fourth proportional to 570,423.39, 787,193.60 and 312,296.03 is: 430,973.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,423.39 : 787,193.60 = 312,296.03 : x
  2. Step 2: Convert to fraction form
    570,423.39/787,193.60 = 312,296.03/x
  3. Step 3: Cross multiply
    570,423.39x = 787,193.60 × 312,296.03
  4. Step 4: Simplify right side
    570,423.39x = 245,837,436,121.41
  5. Step 5: Solve for x
    x = 245,837,436,121.41/570,423.39
  6. Step 6: Final answer
    x = 430,973.62

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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.