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Finding the Fourth Proportional to 647,535,641.70, 971,303,462.55 and 440,911,380.90

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Solution

The fourth proportional to 647,535,641.70, 971,303,462.55 and 440,911,380.90 is: 661,367,071.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,535,641.70 : 971,303,462.55 = 440,911,380.90 : x
  2. Step 2: Convert to fraction form
    647,535,641.70/971,303,462.55 = 440,911,380.90/x
  3. Step 3: Cross multiply
    647,535,641.70x = 971,303,462.55 × 440,911,380.90
  4. Step 4: Simplify right side
    647,535,641.70x = 428,258,750,945,871,872
  5. Step 5: Solve for x
    x = 428,258,750,945,871,872/647,535,641.70
  6. Step 6: Final answer
    x = 661,367,071.35

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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.