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Finding the Fourth Proportional to 680,807.70, 1,021,211.55 and 207,492.30

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Solution

The fourth proportional to 680,807.70, 1,021,211.55 and 207,492.30 is: 311,238.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,807.70 : 1,021,211.55 = 207,492.30 : x
  2. Step 2: Convert to fraction form
    680,807.70/1,021,211.55 = 207,492.30/x
  3. Step 3: Cross multiply
    680,807.70x = 1,021,211.55 × 207,492.30
  4. Step 4: Simplify right side
    680,807.70x = 211,893,533,296.07
  5. Step 5: Solve for x
    x = 211,893,533,296.07/680,807.70
  6. Step 6: Final answer
    x = 311,238.45

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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.