Home / 839,812,128.40-1,260,348,048.60-430,657,670.80

Finding the Fourth Proportional to 839,812,128.40, 1,260,348,048.60 and 430,657,670.80

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Solution

The fourth proportional to 839,812,128.40, 1,260,348,048.60 and 430,657,670.80 is: 646,309,497.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,812,128.40 : 1,260,348,048.60 = 430,657,670.80 : x
  2. Step 2: Convert to fraction form
    839,812,128.40/1,260,348,048.60 = 430,657,670.80/x
  3. Step 3: Cross multiply
    839,812,128.40x = 1,260,348,048.60 × 430,657,670.80
  4. Step 4: Simplify right side
    839,812,128.40x = 542,778,555,007,401,152
  5. Step 5: Solve for x
    x = 542,778,555,007,401,152/839,812,128.40
  6. Step 6: Final answer
    x = 646,309,497.87

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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.