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Finding the Fourth Proportional to 351,356.73, 485,689.47 and 313,491.57

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Solution

The fourth proportional to 351,356.73, 485,689.47 and 313,491.57 is: 433,347.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,356.73 : 485,689.47 = 313,491.57 : x
  2. Step 2: Convert to fraction form
    351,356.73/485,689.47 = 313,491.57/x
  3. Step 3: Cross multiply
    351,356.73x = 485,689.47 × 313,491.57
  4. Step 4: Simplify right side
    351,356.73x = 152,259,554,482.77
  5. Step 5: Solve for x
    x = 152,259,554,482.77/351,356.73
  6. Step 6: Final answer
    x = 433,347.48

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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.