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Finding the Fourth Proportional to 618,985.80, 928,478.70 and 304,057.80

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Solution

The fourth proportional to 618,985.80, 928,478.70 and 304,057.80 is: 456,086.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,985.80 : 928,478.70 = 304,057.80 : x
  2. Step 2: Convert to fraction form
    618,985.80/928,478.70 = 304,057.80/x
  3. Step 3: Cross multiply
    618,985.80x = 928,478.70 × 304,057.80
  4. Step 4: Simplify right side
    618,985.80x = 282,311,190,868.86
  5. Step 5: Solve for x
    x = 282,311,190,868.86/618,985.80
  6. Step 6: Final answer
    x = 456,086.70

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Similar ratio
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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.