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Finding the Fourth Proportional to 1,319,002.40, 1,978,114.80 and 520,018.40

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Solution

The fourth proportional to 1,319,002.40, 1,978,114.80 and 520,018.40 is: 779,874.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,002.40 : 1,978,114.80 = 520,018.40 : x
  2. Step 2: Convert to fraction form
    1,319,002.40/1,978,114.80 = 520,018.40/x
  3. Step 3: Cross multiply
    1,319,002.40x = 1,978,114.80 × 520,018.40
  4. Step 4: Simplify right side
    1,319,002.40x = 1,028,656,093,312.32
  5. Step 5: Solve for x
    x = 1,028,656,093,312.32/1,319,002.40
  6. Step 6: Final answer
    x = 779,874.32

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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.