Home / 728,584,850.70-1,005,448,417.02-398,559,989.70

Finding the Fourth Proportional to 728,584,850.70, 1,005,448,417.02 and 398,559,989.70

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Solution

The fourth proportional to 728,584,850.70, 1,005,448,417.02 and 398,559,989.70 is: 550,013,509.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,584,850.70 : 1,005,448,417.02 = 398,559,989.70 : x
  2. Step 2: Convert to fraction form
    728,584,850.70/1,005,448,417.02 = 398,559,989.70/x
  3. Step 3: Cross multiply
    728,584,850.70x = 1,005,448,417.02 × 398,559,989.70
  4. Step 4: Simplify right side
    728,584,850.70x = 400,731,510,731,372,480
  5. Step 5: Solve for x
    x = 400,731,510,731,372,480/728,584,850.70
  6. Step 6: Final answer
    x = 550,013,509.54

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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.