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Finding the Fourth Proportional to 1,292,582.40, 1,934,726.40 and 919,334.40

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Solution

The fourth proportional to 1,292,582.40, 1,934,726.40 and 919,334.40 is: 1,376,051.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292,582.40 : 1,934,726.40 = 919,334.40 : x
  2. Step 2: Convert to fraction form
    1,292,582.40/1,934,726.40 = 919,334.40/x
  3. Step 3: Cross multiply
    1,292,582.40x = 1,934,726.40 × 919,334.40
  4. Step 4: Simplify right side
    1,292,582.40x = 1,778,660,534,108.16
  5. Step 5: Solve for x
    x = 1,778,660,534,108.16/1,292,582.40
  6. Step 6: Final answer
    x = 1,376,051.95

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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.