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Finding the Fourth Proportional to 879,985,490.20, 1,319,978,235.30 and 471,838,802.20

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Solution

The fourth proportional to 879,985,490.20, 1,319,978,235.30 and 471,838,802.20 is: 707,758,203.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,985,490.20 : 1,319,978,235.30 = 471,838,802.20 : x
  2. Step 2: Convert to fraction form
    879,985,490.20/1,319,978,235.30 = 471,838,802.20/x
  3. Step 3: Cross multiply
    879,985,490.20x = 1,319,978,235.30 × 471,838,802.20
  4. Step 4: Simplify right side
    879,985,490.20x = 622,816,949,474,021,760
  5. Step 5: Solve for x
    x = 622,816,949,474,021,760/879,985,490.20
  6. Step 6: Final answer
    x = 707,758,203.30

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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.