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Finding the Fourth Proportional to 545,113.20, 816,503.40 and 486,015.60

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Solution

The fourth proportional to 545,113.20, 816,503.40 and 486,015.60 is: 727,983.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,113.20 : 816,503.40 = 486,015.60 : x
  2. Step 2: Convert to fraction form
    545,113.20/816,503.40 = 486,015.60/x
  3. Step 3: Cross multiply
    545,113.20x = 816,503.40 × 486,015.60
  4. Step 4: Simplify right side
    545,113.20x = 396,833,389,853.04
  5. Step 5: Solve for x
    x = 396,833,389,853.04/545,113.20
  6. Step 6: Final answer
    x = 727,983.45

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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.