Home / 628,909.55-867,905.70-356,985.83

Finding the Fourth Proportional to 628,909.55, 867,905.70 and 356,985.83

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Solution

The fourth proportional to 628,909.55, 867,905.70 and 356,985.83 is: 492,646.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,909.55 : 867,905.70 = 356,985.83 : x
  2. Step 2: Convert to fraction form
    628,909.55/867,905.70 = 356,985.83/x
  3. Step 3: Cross multiply
    628,909.55x = 867,905.70 × 356,985.83
  4. Step 4: Simplify right side
    628,909.55x = 309,830,032,336.70
  5. Step 5: Solve for x
    x = 309,830,032,336.70/628,909.55
  6. Step 6: Final answer
    x = 492,646.41

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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.