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Finding the Fourth Proportional to 831,390.80, 1,248,007.80 and 516,203.60

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Solution

The fourth proportional to 831,390.80, 1,248,007.80 and 516,203.60 is: 774,877.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,390.80 : 1,248,007.80 = 516,203.60 : x
  2. Step 2: Convert to fraction form
    831,390.80/1,248,007.80 = 516,203.60/x
  3. Step 3: Cross multiply
    831,390.80x = 1,248,007.80 × 516,203.60
  4. Step 4: Simplify right side
    831,390.80x = 644,226,119,188.08
  5. Step 5: Solve for x
    x = 644,226,119,188.08/831,390.80
  6. Step 6: Final answer
    x = 774,877.61

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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.