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Finding the Fourth Proportional to 1,310,658.60, 1,962,051.30 and 777,905.40

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Solution

The fourth proportional to 1,310,658.60, 1,962,051.30 and 777,905.40 is: 1,164,521.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,310,658.60 : 1,962,051.30 = 777,905.40 : x
  2. Step 2: Convert to fraction form
    1,310,658.60/1,962,051.30 = 777,905.40/x
  3. Step 3: Cross multiply
    1,310,658.60x = 1,962,051.30 × 777,905.40
  4. Step 4: Simplify right side
    1,310,658.60x = 1,526,290,301,347.02
  5. Step 5: Solve for x
    x = 1,526,290,301,347.02/1,310,658.60
  6. Step 6: Final answer
    x = 1,164,521.64

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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.