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Finding the Fourth Proportional to 651,672,921.70, 978,643,123.35 and 345,562,905.70

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Solution

The fourth proportional to 651,672,921.70, 978,643,123.35 and 345,562,905.70 is: 518,945,547.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,672,921.70 : 978,643,123.35 = 345,562,905.70 : x
  2. Step 2: Convert to fraction form
    651,672,921.70/978,643,123.35 = 345,562,905.70/x
  3. Step 3: Cross multiply
    651,672,921.70x = 978,643,123.35 × 345,562,905.70
  4. Step 4: Simplify right side
    651,672,921.70x = 338,182,761,348,149,504
  5. Step 5: Solve for x
    x = 338,182,761,348,149,504/651,672,921.70
  6. Step 6: Final answer
    x = 518,945,547.82

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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.