Home / 628,822.80-942,641.28-312,981.12

Finding the Fourth Proportional to 628,822.80, 942,641.28 and 312,981.12

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Solution

The fourth proportional to 628,822.80, 942,641.28 and 312,981.12 is: 469,176.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,822.80 : 942,641.28 = 312,981.12 : x
  2. Step 2: Convert to fraction form
    628,822.80/942,641.28 = 312,981.12/x
  3. Step 3: Cross multiply
    628,822.80x = 942,641.28 × 312,981.12
  4. Step 4: Simplify right side
    628,822.80x = 295,028,923,572.63
  5. Step 5: Solve for x
    x = 295,028,923,572.63/628,822.80
  6. Step 6: Final answer
    x = 469,176.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.