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Finding the Fourth Proportional to 1,299,846.40, 1,950,921.60 and 766,700.80

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Solution

The fourth proportional to 1,299,846.40, 1,950,921.60 and 766,700.80 is: 1,150,730.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299,846.40 : 1,950,921.60 = 766,700.80 : x
  2. Step 2: Convert to fraction form
    1,299,846.40/1,950,921.60 = 766,700.80/x
  3. Step 3: Cross multiply
    1,299,846.40x = 1,950,921.60 × 766,700.80
  4. Step 4: Simplify right side
    1,299,846.40x = 1,495,773,151,457.28
  5. Step 5: Solve for x
    x = 1,495,773,151,457.28/1,299,846.40
  6. Step 6: Final answer
    x = 1,150,730.70

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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.