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Finding the Fourth Proportional to 720,072,139.20, 1,080,108,208.80 and 708,593,013.60

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Solution

The fourth proportional to 720,072,139.20, 1,080,108,208.80 and 708,593,013.60 is: 1,062,889,520.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,072,139.20 : 1,080,108,208.80 = 708,593,013.60 : x
  2. Step 2: Convert to fraction form
    720,072,139.20/1,080,108,208.80 = 708,593,013.60/x
  3. Step 3: Cross multiply
    720,072,139.20x = 1,080,108,208.80 × 708,593,013.60
  4. Step 4: Simplify right side
    720,072,139.20x = 765,357,130,687,689,984
  5. Step 5: Solve for x
    x = 765,357,130,687,689,984/720,072,139.20
  6. Step 6: Final answer
    x = 1,062,889,520.40

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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.