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Finding the Fourth Proportional to 559,993.80, 839,990.70 and 346,931.40

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Solution

The fourth proportional to 559,993.80, 839,990.70 and 346,931.40 is: 520,397.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,993.80 : 839,990.70 = 346,931.40 : x
  2. Step 2: Convert to fraction form
    559,993.80/839,990.70 = 346,931.40/x
  3. Step 3: Cross multiply
    559,993.80x = 839,990.70 × 346,931.40
  4. Step 4: Simplify right side
    559,993.80x = 291,419,149,537.98
  5. Step 5: Solve for x
    x = 291,419,149,537.98/559,993.80
  6. Step 6: Final answer
    x = 520,397.10

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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.