Home / 778,520.48-1,074,358.40-438,988.72

Finding the Fourth Proportional to 778,520.48, 1,074,358.40 and 438,988.72

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Solution

The fourth proportional to 778,520.48, 1,074,358.40 and 438,988.72 is: 605,804.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,520.48 : 1,074,358.40 = 438,988.72 : x
  2. Step 2: Convert to fraction form
    778,520.48/1,074,358.40 = 438,988.72/x
  3. Step 3: Cross multiply
    778,520.48x = 1,074,358.40 × 438,988.72
  4. Step 4: Simplify right side
    778,520.48x = 471,631,218,837.25
  5. Step 5: Solve for x
    x = 471,631,218,837.25/778,520.48
  6. Step 6: Final answer
    x = 605,804.51

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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.