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Finding the Fourth Proportional to 628,553.88, 942,302.70 and 509,931

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Solution

The fourth proportional to 628,553.88, 942,302.70 and 509,931 is: 764,468.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,553.88 : 942,302.70 = 509,931 : x
  2. Step 2: Convert to fraction form
    628,553.88/942,302.70 = 509,931/x
  3. Step 3: Cross multiply
    628,553.88x = 942,302.70 × 509,931
  4. Step 4: Simplify right side
    628,553.88x = 480,509,358,113.70
  5. Step 5: Solve for x
    x = 480,509,358,113.70/628,553.88
  6. Step 6: Final answer
    x = 764,468.05

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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.