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Finding the Fourth Proportional to 670,425.40, 1,005,686.70 and 403,611.40

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Solution

The fourth proportional to 670,425.40, 1,005,686.70 and 403,611.40 is: 605,446.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,425.40 : 1,005,686.70 = 403,611.40 : x
  2. Step 2: Convert to fraction form
    670,425.40/1,005,686.70 = 403,611.40/x
  3. Step 3: Cross multiply
    670,425.40x = 1,005,686.70 × 403,611.40
  4. Step 4: Simplify right side
    670,425.40x = 405,906,616,948.38
  5. Step 5: Solve for x
    x = 405,906,616,948.38/670,425.40
  6. Step 6: Final answer
    x = 605,446.36

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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.