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Finding the Fourth Proportional to 604,905.40, 907,358.10 and 405,839.80

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Solution

The fourth proportional to 604,905.40, 907,358.10 and 405,839.80 is: 608,759.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,905.40 : 907,358.10 = 405,839.80 : x
  2. Step 2: Convert to fraction form
    604,905.40/907,358.10 = 405,839.80/x
  3. Step 3: Cross multiply
    604,905.40x = 907,358.10 × 405,839.80
  4. Step 4: Simplify right side
    604,905.40x = 368,242,029,832.38
  5. Step 5: Solve for x
    x = 368,242,029,832.38/604,905.40
  6. Step 6: Final answer
    x = 608,759.70

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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.