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Finding the Fourth Proportional to 692,023.54, 954,990.92 and 390,215.38

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Solution

The fourth proportional to 692,023.54, 954,990.92 and 390,215.38 is: 538,496.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,023.54 : 954,990.92 = 390,215.38 : x
  2. Step 2: Convert to fraction form
    692,023.54/954,990.92 = 390,215.38/x
  3. Step 3: Cross multiply
    692,023.54x = 954,990.92 × 390,215.38
  4. Step 4: Simplify right side
    692,023.54x = 372,652,144,744.35
  5. Step 5: Solve for x
    x = 372,652,144,744.35/692,023.54
  6. Step 6: Final answer
    x = 538,496.34

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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.