Home / 772,557.49-1,066,131.71-428,417.65

Finding the Fourth Proportional to 772,557.49, 1,066,131.71 and 428,417.65

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Solution

The fourth proportional to 772,557.49, 1,066,131.71 and 428,417.65 is: 591,217.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    772,557.49 : 1,066,131.71 = 428,417.65 : x
  2. Step 2: Convert to fraction form
    772,557.49/1,066,131.71 = 428,417.65/x
  3. Step 3: Cross multiply
    772,557.49x = 1,066,131.71 × 428,417.65
  4. Step 4: Simplify right side
    772,557.49x = 456,749,641,788.68
  5. Step 5: Solve for x
    x = 456,749,641,788.68/772,557.49
  6. Step 6: Final answer
    x = 591,217.67

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Double scale
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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.