Home / 470,448,003.20-705,672,004.80-421,130,278.40

Finding the Fourth Proportional to 470,448,003.20, 705,672,004.80 and 421,130,278.40

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Solution

The fourth proportional to 470,448,003.20, 705,672,004.80 and 421,130,278.40 is: 631,695,417.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,448,003.20 : 705,672,004.80 = 421,130,278.40 : x
  2. Step 2: Convert to fraction form
    470,448,003.20/705,672,004.80 = 421,130,278.40/x
  3. Step 3: Cross multiply
    470,448,003.20x = 705,672,004.80 × 421,130,278.40
  4. Step 4: Simplify right side
    470,448,003.20x = 297,179,847,840,510,080
  5. Step 5: Solve for x
    x = 297,179,847,840,510,080/470,448,003.20
  6. Step 6: Final answer
    x = 631,695,417.60

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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.