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Finding the Fourth Proportional to 670,621.70, 1,005,932.55 and 619,300.10

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Solution

The fourth proportional to 670,621.70, 1,005,932.55 and 619,300.10 is: 928,950.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,621.70 : 1,005,932.55 = 619,300.10 : x
  2. Step 2: Convert to fraction form
    670,621.70/1,005,932.55 = 619,300.10/x
  3. Step 3: Cross multiply
    670,621.70x = 1,005,932.55 × 619,300.10
  4. Step 4: Simplify right side
    670,621.70x = 622,974,128,808.26
  5. Step 5: Solve for x
    x = 622,974,128,808.26/670,621.70
  6. Step 6: Final answer
    x = 928,950.15

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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.