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Finding the Fourth Proportional to 720,039,483.98, 993,649,197.74 and 406,768,005.26

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Solution

The fourth proportional to 720,039,483.98, 993,649,197.74 and 406,768,005.26 is: 561,336,858.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,039,483.98 : 993,649,197.74 = 406,768,005.26 : x
  2. Step 2: Convert to fraction form
    720,039,483.98/993,649,197.74 = 406,768,005.26/x
  3. Step 3: Cross multiply
    720,039,483.98x = 993,649,197.74 × 406,768,005.26
  4. Step 4: Simplify right side
    720,039,483.98x = 404,184,702,092,899,072
  5. Step 5: Solve for x
    x = 404,184,702,092,899,072/720,039,483.98
  6. Step 6: Final answer
    x = 561,336,858.72

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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.