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Finding the Fourth Proportional to 660,482,800.85, 910,717,424.61 and 422,012,930.51

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Solution

The fourth proportional to 660,482,800.85, 910,717,424.61 and 422,012,930.51 is: 581,899,375.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,482,800.85 : 910,717,424.61 = 422,012,930.51 : x
  2. Step 2: Convert to fraction form
    660,482,800.85/910,717,424.61 = 422,012,930.51/x
  3. Step 3: Cross multiply
    660,482,800.85x = 910,717,424.61 × 422,012,930.51
  4. Step 4: Simplify right side
    660,482,800.85x = 384,334,529,226,186,112
  5. Step 5: Solve for x
    x = 384,334,529,226,186,112/660,482,800.85
  6. Step 6: Final answer
    x = 581,899,375.32

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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.