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Finding the Fourth Proportional to 1,315,197, 1,814,971.86 and 711,585

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Solution

The fourth proportional to 1,315,197, 1,814,971.86 and 711,585 is: 981,987.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,197 : 1,814,971.86 = 711,585 : x
  2. Step 2: Convert to fraction form
    1,315,197/1,814,971.86 = 711,585/x
  3. Step 3: Cross multiply
    1,315,197x = 1,814,971.86 × 711,585
  4. Step 4: Simplify right side
    1,315,197x = 1,291,506,750,998.10
  5. Step 5: Solve for x
    x = 1,291,506,750,998.10/1,315,197
  6. Step 6: Final answer
    x = 981,987.30

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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.