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Finding the Fourth Proportional to 993,805.80, 1,490,708.70 and 328,871.40

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Solution

The fourth proportional to 993,805.80, 1,490,708.70 and 328,871.40 is: 493,307.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    993,805.80 : 1,490,708.70 = 328,871.40 : x
  2. Step 2: Convert to fraction form
    993,805.80/1,490,708.70 = 328,871.40/x
  3. Step 3: Cross multiply
    993,805.80x = 1,490,708.70 × 328,871.40
  4. Step 4: Simplify right side
    993,805.80x = 490,251,457,161.18
  5. Step 5: Solve for x
    x = 490,251,457,161.18/993,805.80
  6. Step 6: Final answer
    x = 493,307.10

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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.