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Finding the Fourth Proportional to 485,916.76, 670,523.17 and 313,842.34

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Solution

The fourth proportional to 485,916.76, 670,523.17 and 313,842.34 is: 433,075.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,916.76 : 670,523.17 = 313,842.34 : x
  2. Step 2: Convert to fraction form
    485,916.76/670,523.17 = 313,842.34/x
  3. Step 3: Cross multiply
    485,916.76x = 670,523.17 × 313,842.34
  4. Step 4: Simplify right side
    485,916.76x = 210,438,556,559.80
  5. Step 5: Solve for x
    x = 210,438,556,559.80/485,916.76
  6. Step 6: Final answer
    x = 433,075.32

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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.