Home / 858,873,724.20-1,288,688,499.90-398,574,959.40

Finding the Fourth Proportional to 858,873,724.20, 1,288,688,499.90 and 398,574,959.40

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Solution

The fourth proportional to 858,873,724.20, 1,288,688,499.90 and 398,574,959.40 is: 598,037,816.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,873,724.20 : 1,288,688,499.90 = 398,574,959.40 : x
  2. Step 2: Convert to fraction form
    858,873,724.20/1,288,688,499.90 = 398,574,959.40/x
  3. Step 3: Cross multiply
    858,873,724.20x = 1,288,688,499.90 × 398,574,959.40
  4. Step 4: Simplify right side
    858,873,724.20x = 513,638,966,526,889,408
  5. Step 5: Solve for x
    x = 513,638,966,526,889,408/858,873,724.20
  6. Step 6: Final answer
    x = 598,037,816.33

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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.