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Finding the Fourth Proportional to 608,410.36, 839,718.61 and 390,890.95

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Solution

The fourth proportional to 608,410.36, 839,718.61 and 390,890.95 is: 539,501.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,410.36 : 839,718.61 = 390,890.95 : x
  2. Step 2: Convert to fraction form
    608,410.36/839,718.61 = 390,890.95/x
  3. Step 3: Cross multiply
    608,410.36x = 839,718.61 × 390,890.95
  4. Step 4: Simplify right side
    608,410.36x = 328,238,405,195.58
  5. Step 5: Solve for x
    x = 328,238,405,195.58/608,410.36
  6. Step 6: Final answer
    x = 539,501.67

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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.