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Finding the Fourth Proportional to 1,290,603.60, 1,935,905.40 and 817,822.80

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Solution

The fourth proportional to 1,290,603.60, 1,935,905.40 and 817,822.80 is: 1,226,734.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,603.60 : 1,935,905.40 = 817,822.80 : x
  2. Step 2: Convert to fraction form
    1,290,603.60/1,935,905.40 = 817,822.80/x
  3. Step 3: Cross multiply
    1,290,603.60x = 1,935,905.40 × 817,822.80
  4. Step 4: Simplify right side
    1,290,603.60x = 1,583,227,574,763.12
  5. Step 5: Solve for x
    x = 1,583,227,574,763.12/1,290,603.60
  6. Step 6: Final answer
    x = 1,226,734.20

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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.