Home / 513,215,999.40-769,823,999.10-309,142,655.40

Finding the Fourth Proportional to 513,215,999.40, 769,823,999.10 and 309,142,655.40

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Solution

The fourth proportional to 513,215,999.40, 769,823,999.10 and 309,142,655.40 is: 463,713,983.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,215,999.40 : 769,823,999.10 = 309,142,655.40 : x
  2. Step 2: Convert to fraction form
    513,215,999.40/769,823,999.10 = 309,142,655.40/x
  3. Step 3: Cross multiply
    513,215,999.40x = 769,823,999.10 × 309,142,655.40
  4. Step 4: Simplify right side
    513,215,999.40x = 237,985,435,272,421,184
  5. Step 5: Solve for x
    x = 237,985,435,272,421,184/513,215,999.40
  6. Step 6: Final answer
    x = 463,713,983.10

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1.5x scale

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.