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Finding the Fourth Proportional to 664,260,017.60, 996,390,026.40 and 319,130,422.40

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Solution

The fourth proportional to 664,260,017.60, 996,390,026.40 and 319,130,422.40 is: 478,695,633.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,260,017.60 : 996,390,026.40 = 319,130,422.40 : x
  2. Step 2: Convert to fraction form
    664,260,017.60/996,390,026.40 = 319,130,422.40/x
  3. Step 3: Cross multiply
    664,260,017.60x = 996,390,026.40 × 319,130,422.40
  4. Step 4: Simplify right side
    664,260,017.60x = 317,978,370,000,179,136
  5. Step 5: Solve for x
    x = 317,978,370,000,179,136/664,260,017.60
  6. Step 6: Final answer
    x = 478,695,633.60

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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.