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Finding the Fourth Proportional to 611,653.80, 917,480.70 and 399,077.40

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Solution

The fourth proportional to 611,653.80, 917,480.70 and 399,077.40 is: 598,616.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,653.80 : 917,480.70 = 399,077.40 : x
  2. Step 2: Convert to fraction form
    611,653.80/917,480.70 = 399,077.40/x
  3. Step 3: Cross multiply
    611,653.80x = 917,480.70 × 399,077.40
  4. Step 4: Simplify right side
    611,653.80x = 366,145,812,306.18
  5. Step 5: Solve for x
    x = 366,145,812,306.18/611,653.80
  6. Step 6: Final answer
    x = 598,616.10

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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.