Home / 715,977,907.88-988,042,374.21-398,432,714.73

Finding the Fourth Proportional to 715,977,907.88, 988,042,374.21 and 398,432,714.73

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Solution

The fourth proportional to 715,977,907.88, 988,042,374.21 and 398,432,714.73 is: 549,833,173.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,977,907.88 : 988,042,374.21 = 398,432,714.73 : x
  2. Step 2: Convert to fraction form
    715,977,907.88/988,042,374.21 = 398,432,714.73/x
  3. Step 3: Cross multiply
    715,977,907.88x = 988,042,374.21 × 398,432,714.73
  4. Step 4: Simplify right side
    715,977,907.88x = 393,668,405,422,553,792
  5. Step 5: Solve for x
    x = 393,668,405,422,553,792/715,977,907.88
  6. Step 6: Final answer
    x = 549,833,173.75

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Double scale
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1.5x scale

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.