Home / 1,223,919,772.20-1,688,960,011.14-666,990,861.48

Finding the Fourth Proportional to 1,223,919,772.20, 1,688,960,011.14 and 666,990,861.48

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Solution

The fourth proportional to 1,223,919,772.20, 1,688,960,011.14 and 666,990,861.48 is: 920,420,536.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223,919,772.20 : 1,688,960,011.14 = 666,990,861.48 : x
  2. Step 2: Convert to fraction form
    1,223,919,772.20/1,688,960,011.14 = 666,990,861.48/x
  3. Step 3: Cross multiply
    1,223,919,772.20x = 1,688,960,011.14 × 666,990,861.48
  4. Step 4: Simplify right side
    1,223,919,772.20x = 1,126,520,892,835,539,072
  5. Step 5: Solve for x
    x = 1,126,520,892,835,539,072/1,223,919,772.20
  6. Step 6: Final answer
    x = 920,420,536.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.