Home / 811,103,680.35-1,216,655,520.53-538,474,447.35

Finding the Fourth Proportional to 811,103,680.35, 1,216,655,520.53 and 538,474,447.35

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Solution

The fourth proportional to 811,103,680.35, 1,216,655,520.53 and 538,474,447.35 is: 807,711,671.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,103,680.35 : 1,216,655,520.53 = 538,474,447.35 : x
  2. Step 2: Convert to fraction form
    811,103,680.35/1,216,655,520.53 = 538,474,447.35/x
  3. Step 3: Cross multiply
    811,103,680.35x = 1,216,655,520.53 × 538,474,447.35
  4. Step 4: Simplify right side
    811,103,680.35x = 655,137,909,030,025,984
  5. Step 5: Solve for x
    x = 655,137,909,030,025,984/811,103,680.35
  6. Step 6: Final answer
    x = 807,711,671.03

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Double scale
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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.