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Finding the Fourth Proportional to 891,153.40, 1,229,678.40 and 509,204.92

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Solution

The fourth proportional to 891,153.40, 1,229,678.40 and 509,204.92 is: 702,638.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,153.40 : 1,229,678.40 = 509,204.92 : x
  2. Step 2: Convert to fraction form
    891,153.40/1,229,678.40 = 509,204.92/x
  3. Step 3: Cross multiply
    891,153.40x = 1,229,678.40 × 509,204.92
  4. Step 4: Simplify right side
    891,153.40x = 626,158,291,297.73
  5. Step 5: Solve for x
    x = 626,158,291,297.73/891,153.40
  6. Step 6: Final answer
    x = 702,638.05

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Double scale
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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.