Home / 830,420.07-1,145,979.70-448,446.85

Finding the Fourth Proportional to 830,420.07, 1,145,979.70 and 448,446.85

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Solution

The fourth proportional to 830,420.07, 1,145,979.70 and 448,446.85 is: 618,856.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,420.07 : 1,145,979.70 = 448,446.85 : x
  2. Step 2: Convert to fraction form
    830,420.07/1,145,979.70 = 448,446.85/x
  3. Step 3: Cross multiply
    830,420.07x = 1,145,979.70 × 448,446.85
  4. Step 4: Simplify right side
    830,420.07x = 513,910,982,642.88
  5. Step 5: Solve for x
    x = 513,910,982,642.88/830,420.07
  6. Step 6: Final answer
    x = 618,856.65

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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.