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Finding the Fourth Proportional to 608,406.98, 839,713.95 and 390,887.57

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Solution

The fourth proportional to 608,406.98, 839,713.95 and 390,887.57 is: 539,497.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,406.98 : 839,713.95 = 390,887.57 : x
  2. Step 2: Convert to fraction form
    608,406.98/839,713.95 = 390,887.57/x
  3. Step 3: Cross multiply
    608,406.98x = 839,713.95 × 390,887.57
  4. Step 4: Simplify right side
    608,406.98x = 328,233,744,360.96
  5. Step 5: Solve for x
    x = 328,233,744,360.96/608,406.98
  6. Step 6: Final answer
    x = 539,497.01

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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.