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Finding the Fourth Proportional to 912,892.88, 1,369,463.93 and 380,289.33

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Solution

The fourth proportional to 912,892.88, 1,369,463.93 and 380,289.33 is: 570,485.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,892.88 : 1,369,463.93 = 380,289.33 : x
  2. Step 2: Convert to fraction form
    912,892.88/1,369,463.93 = 380,289.33/x
  3. Step 3: Cross multiply
    912,892.88x = 1,369,463.93 × 380,289.33
  4. Step 4: Simplify right side
    912,892.88x = 520,792,515,073.76
  5. Step 5: Solve for x
    x = 520,792,515,073.76/912,892.88
  6. Step 6: Final answer
    x = 570,485.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.