Home / 778,914.72-1,074,901.68-421,218.72

Finding the Fourth Proportional to 778,914.72, 1,074,901.68 and 421,218.72

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Solution

The fourth proportional to 778,914.72, 1,074,901.68 and 421,218.72 is: 581,281.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,914.72 : 1,074,901.68 = 421,218.72 : x
  2. Step 2: Convert to fraction form
    778,914.72/1,074,901.68 = 421,218.72/x
  3. Step 3: Cross multiply
    778,914.72x = 1,074,901.68 × 421,218.72
  4. Step 4: Simplify right side
    778,914.72x = 452,768,709,775.45
  5. Step 5: Solve for x
    x = 452,768,709,775.45/778,914.72
  6. Step 6: Final answer
    x = 581,281.49

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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.