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Finding the Fourth Proportional to 611,678.80, 917,518.32 and 190,990.72

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Solution

The fourth proportional to 611,678.80, 917,518.32 and 190,990.72 is: 286,486.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,678.80 : 917,518.32 = 190,990.72 : x
  2. Step 2: Convert to fraction form
    611,678.80/917,518.32 = 190,990.72/x
  3. Step 3: Cross multiply
    611,678.80x = 917,518.32 × 190,990.72
  4. Step 4: Simplify right side
    611,678.80x = 175,237,484,549.99
  5. Step 5: Solve for x
    x = 175,237,484,549.99/611,678.80
  6. Step 6: Final answer
    x = 286,486.12

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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.