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Finding the Fourth Proportional to 647,535,659.20, 971,303,488.80 and 440,911,398.40

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Solution

The fourth proportional to 647,535,659.20, 971,303,488.80 and 440,911,398.40 is: 661,367,097.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,535,659.20 : 971,303,488.80 = 440,911,398.40 : x
  2. Step 2: Convert to fraction form
    647,535,659.20/971,303,488.80 = 440,911,398.40/x
  3. Step 3: Cross multiply
    647,535,659.20x = 971,303,488.80 × 440,911,398.40
  4. Step 4: Simplify right side
    647,535,659.20x = 428,258,779,517,606,720
  5. Step 5: Solve for x
    x = 428,258,779,517,606,720/647,535,659.20
  6. Step 6: Final answer
    x = 661,367,097.60

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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.