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Finding the Fourth Proportional to 1,977,342.60, 2,965,430.70 and 778,866.60

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Solution

The fourth proportional to 1,977,342.60, 2,965,430.70 and 778,866.60 is: 1,168,070.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977,342.60 : 2,965,430.70 = 778,866.60 : x
  2. Step 2: Convert to fraction form
    1,977,342.60/2,965,430.70 = 778,866.60/x
  3. Step 3: Cross multiply
    1,977,342.60x = 2,965,430.70 × 778,866.60
  4. Step 4: Simplify right side
    1,977,342.60x = 2,309,674,926,844.62
  5. Step 5: Solve for x
    x = 2,309,674,926,844.62/1,977,342.60
  6. Step 6: Final answer
    x = 1,168,070.18

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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.