Home / 621,011.79-931,281.28-407,722.66

Finding the Fourth Proportional to 621,011.79, 931,281.28 and 407,722.66

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Solution

The fourth proportional to 621,011.79, 931,281.28 and 407,722.66 is: 611,428.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,011.79 : 931,281.28 = 407,722.66 : x
  2. Step 2: Convert to fraction form
    621,011.79/931,281.28 = 407,722.66/x
  3. Step 3: Cross multiply
    621,011.79x = 931,281.28 × 407,722.66
  4. Step 4: Simplify right side
    621,011.79x = 379,704,477,342.30
  5. Step 5: Solve for x
    x = 379,704,477,342.30/621,011.79
  6. Step 6: Final answer
    x = 611,428.77

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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.