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Finding the Fourth Proportional to 1,319,008.40, 1,978,123.80 and 520,024.40

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Solution

The fourth proportional to 1,319,008.40, 1,978,123.80 and 520,024.40 is: 779,883.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,008.40 : 1,978,123.80 = 520,024.40 : x
  2. Step 2: Convert to fraction form
    1,319,008.40/1,978,123.80 = 520,024.40/x
  3. Step 3: Cross multiply
    1,319,008.40x = 1,978,123.80 × 520,024.40
  4. Step 4: Simplify right side
    1,319,008.40x = 1,028,672,642,220.72
  5. Step 5: Solve for x
    x = 1,028,672,642,220.72/1,319,008.40
  6. Step 6: Final answer
    x = 779,883.31

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.