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Finding the Fourth Proportional to 604,887.40, 907,331.10 and 405,821.80

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Solution

The fourth proportional to 604,887.40, 907,331.10 and 405,821.80 is: 608,732.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,887.40 : 907,331.10 = 405,821.80 : x
  2. Step 2: Convert to fraction form
    604,887.40/907,331.10 = 405,821.80/x
  3. Step 3: Cross multiply
    604,887.40x = 907,331.10 × 405,821.80
  4. Step 4: Simplify right side
    604,887.40x = 368,214,740,197.98
  5. Step 5: Solve for x
    x = 368,214,740,197.98/604,887.40
  6. Step 6: Final answer
    x = 608,732.70

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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.