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Finding the Fourth Proportional to 604,886.40, 907,329.60 and 405,820.80

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Solution

The fourth proportional to 604,886.40, 907,329.60 and 405,820.80 is: 608,731.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,886.40 : 907,329.60 = 405,820.80 : x
  2. Step 2: Convert to fraction form
    604,886.40/907,329.60 = 405,820.80/x
  3. Step 3: Cross multiply
    604,886.40x = 907,329.60 × 405,820.80
  4. Step 4: Simplify right side
    604,886.40x = 368,213,224,135.68
  5. Step 5: Solve for x
    x = 368,213,224,135.68/604,886.40
  6. Step 6: Final answer
    x = 608,731.20

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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.