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Finding the Fourth Proportional to 559,938.80, 839,908.20 and 307,996.40

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Solution

The fourth proportional to 559,938.80, 839,908.20 and 307,996.40 is: 461,994.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,938.80 : 839,908.20 = 307,996.40 : x
  2. Step 2: Convert to fraction form
    559,938.80/839,908.20 = 307,996.40/x
  3. Step 3: Cross multiply
    559,938.80x = 839,908.20 × 307,996.40
  4. Step 4: Simplify right side
    559,938.80x = 258,688,701,930.48
  5. Step 5: Solve for x
    x = 258,688,701,930.48/559,938.80
  6. Step 6: Final answer
    x = 461,994.60

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Double scale
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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.