Home / 858,845,415.60-1,288,939,969.80-398,840,583.60

Finding the Fourth Proportional to 858,845,415.60, 1,288,939,969.80 and 398,840,583.60

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Solution

The fourth proportional to 858,845,415.60, 1,288,939,969.80 and 398,840,583.60 is: 598,572,875.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,845,415.60 : 1,288,939,969.80 = 398,840,583.60 : x
  2. Step 2: Convert to fraction form
    858,845,415.60/1,288,939,969.80 = 398,840,583.60/x
  3. Step 3: Cross multiply
    858,845,415.60x = 1,288,939,969.80 × 398,840,583.60
  4. Step 4: Simplify right side
    858,845,415.60x = 514,081,569,780,398,400
  5. Step 5: Solve for x
    x = 514,081,569,780,398,400/858,845,415.60
  6. Step 6: Final answer
    x = 598,572,875.21

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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.