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Finding the Fourth Proportional to 620,459.90, 929,705.70 and 409,851.80

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Solution

The fourth proportional to 620,459.90, 929,705.70 and 409,851.80 is: 614,127.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,459.90 : 929,705.70 = 409,851.80 : x
  2. Step 2: Convert to fraction form
    620,459.90/929,705.70 = 409,851.80/x
  3. Step 3: Cross multiply
    620,459.90x = 929,705.70 × 409,851.80
  4. Step 4: Simplify right side
    620,459.90x = 381,041,554,615.26
  5. Step 5: Solve for x
    x = 381,041,554,615.26/620,459.90
  6. Step 6: Final answer
    x = 614,127.61

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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.