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Finding the Fourth Proportional to 620,706.48, 931,468.02 and 340,420.56

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Solution

The fourth proportional to 620,706.48, 931,468.02 and 340,420.56 is: 510,854.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,706.48 : 931,468.02 = 340,420.56 : x
  2. Step 2: Convert to fraction form
    620,706.48/931,468.02 = 340,420.56/x
  3. Step 3: Cross multiply
    620,706.48x = 931,468.02 × 340,420.56
  4. Step 4: Simplify right side
    620,706.48x = 317,090,864,990.49
  5. Step 5: Solve for x
    x = 317,090,864,990.49/620,706.48
  6. Step 6: Final answer
    x = 510,854.77

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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.