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Finding the Fourth Proportional to 989,807.70, 1,484,760.15 and 517,415.70

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Solution

The fourth proportional to 989,807.70, 1,484,760.15 and 517,415.70 is: 776,148.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,807.70 : 1,484,760.15 = 517,415.70 : x
  2. Step 2: Convert to fraction form
    989,807.70/1,484,760.15 = 517,415.70/x
  3. Step 3: Cross multiply
    989,807.70x = 1,484,760.15 × 517,415.70
  4. Step 4: Simplify right side
    989,807.70x = 768,238,212,344.36
  5. Step 5: Solve for x
    x = 768,238,212,344.36/989,807.70
  6. Step 6: Final answer
    x = 776,148.96

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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.