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Finding the Fourth Proportional to 611,607.90, 917,083.80 and 256,220.40

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Solution

The fourth proportional to 611,607.90, 917,083.80 and 256,220.40 is: 384,193.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,607.90 : 917,083.80 = 256,220.40 : x
  2. Step 2: Convert to fraction form
    611,607.90/917,083.80 = 256,220.40/x
  3. Step 3: Cross multiply
    611,607.90x = 917,083.80 × 256,220.40
  4. Step 4: Simplify right side
    611,607.90x = 234,975,578,069.52
  5. Step 5: Solve for x
    x = 234,975,578,069.52/611,607.90
  6. Step 6: Final answer
    x = 384,193.17

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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.