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Finding the Fourth Proportional to 664,432,854.60, 996,649,281.90 and 319,303,259.40

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Solution

The fourth proportional to 664,432,854.60, 996,649,281.90 and 319,303,259.40 is: 478,954,889.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,432,854.60 : 996,649,281.90 = 319,303,259.40 : x
  2. Step 2: Convert to fraction form
    664,432,854.60/996,649,281.90 = 319,303,259.40/x
  3. Step 3: Cross multiply
    664,432,854.60x = 996,649,281.90 × 319,303,259.40
  4. Step 4: Simplify right side
    664,432,854.60x = 318,233,364,189,339,392
  5. Step 5: Solve for x
    x = 318,233,364,189,339,392/664,432,854.60
  6. Step 6: Final answer
    x = 478,954,889.10

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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.