Home / 839,917.20-1,259,875.80-390,488.70

Finding the Fourth Proportional to 839,917.20, 1,259,875.80 and 390,488.70

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Solution

The fourth proportional to 839,917.20, 1,259,875.80 and 390,488.70 is: 585,733.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,917.20 : 1,259,875.80 = 390,488.70 : x
  2. Step 2: Convert to fraction form
    839,917.20/1,259,875.80 = 390,488.70/x
  3. Step 3: Cross multiply
    839,917.20x = 1,259,875.80 × 390,488.70
  4. Step 4: Simplify right side
    839,917.20x = 491,967,263,303.46
  5. Step 5: Solve for x
    x = 491,967,263,303.46/839,917.20
  6. Step 6: Final answer
    x = 585,733.05

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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.