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Finding the Fourth Proportional to 668,888.20, 1,004,970.70 and 503,000.20

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Solution

The fourth proportional to 668,888.20, 1,004,970.70 and 503,000.20 is: 755,732.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,888.20 : 1,004,970.70 = 503,000.20 : x
  2. Step 2: Convert to fraction form
    668,888.20/1,004,970.70 = 503,000.20/x
  3. Step 3: Cross multiply
    668,888.20x = 1,004,970.70 × 503,000.20
  4. Step 4: Simplify right side
    668,888.20x = 505,500,463,094.14
  5. Step 5: Solve for x
    x = 505,500,463,094.14/668,888.20
  6. Step 6: Final answer
    x = 755,732.37

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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.