Home / 768,209,985.72-1,152,316,749.96-442,812,204.36

Finding the Fourth Proportional to 768,209,985.72, 1,152,316,749.96 and 442,812,204.36

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Solution

The fourth proportional to 768,209,985.72, 1,152,316,749.96 and 442,812,204.36 is: 664,219,327.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,209,985.72 : 1,152,316,749.96 = 442,812,204.36 : x
  2. Step 2: Convert to fraction form
    768,209,985.72/1,152,316,749.96 = 442,812,204.36/x
  3. Step 3: Cross multiply
    768,209,985.72x = 1,152,316,749.96 × 442,812,204.36
  4. Step 4: Simplify right side
    768,209,985.72x = 510,259,920,170,738,560
  5. Step 5: Solve for x
    x = 510,259,920,170,738,560/768,209,985.72
  6. Step 6: Final answer
    x = 664,219,327.60

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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.