Home / 678,557.20-1,017,835.80-620,496.40

Finding the Fourth Proportional to 678,557.20, 1,017,835.80 and 620,496.40

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Solution

The fourth proportional to 678,557.20, 1,017,835.80 and 620,496.40 is: 930,744.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,557.20 : 1,017,835.80 = 620,496.40 : x
  2. Step 2: Convert to fraction form
    678,557.20/1,017,835.80 = 620,496.40/x
  3. Step 3: Cross multiply
    678,557.20x = 1,017,835.80 × 620,496.40
  4. Step 4: Simplify right side
    678,557.20x = 631,563,449,691.12
  5. Step 5: Solve for x
    x = 631,563,449,691.12/678,557.20
  6. Step 6: Final answer
    x = 930,744.60

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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.