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Finding the Fourth Proportional to 692,068.50, 955,112.85 and 390,320.82

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Solution

The fourth proportional to 692,068.50, 955,112.85 and 390,320.82 is: 538,675.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,068.50 : 955,112.85 = 390,320.82 : x
  2. Step 2: Convert to fraction form
    692,068.50/955,112.85 = 390,320.82/x
  3. Step 3: Cross multiply
    692,068.50x = 955,112.85 × 390,320.82
  4. Step 4: Simplify right side
    692,068.50x = 372,800,430,804.54
  5. Step 5: Solve for x
    x = 372,800,430,804.54/692,068.50
  6. Step 6: Final answer
    x = 538,675.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.