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Finding the Fourth Proportional to 570,420.73, 787,189.89 and 312,293.32

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Solution

The fourth proportional to 570,420.73, 787,189.89 and 312,293.32 is: 430,969.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,420.73 : 787,189.89 = 312,293.32 : x
  2. Step 2: Convert to fraction form
    570,420.73/787,189.89 = 312,293.32/x
  3. Step 3: Cross multiply
    570,420.73x = 787,189.89 × 312,293.32
  4. Step 4: Simplify right side
    570,420.73x = 245,834,147,849.60
  5. Step 5: Solve for x
    x = 245,834,147,849.60/570,420.73
  6. Step 6: Final answer
    x = 430,969.87

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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.