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Finding the Fourth Proportional to 606,938.40, 910,407.60 and 407,872.80

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Solution

The fourth proportional to 606,938.40, 910,407.60 and 407,872.80 is: 611,809.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,938.40 : 910,407.60 = 407,872.80 : x
  2. Step 2: Convert to fraction form
    606,938.40/910,407.60 = 407,872.80/x
  3. Step 3: Cross multiply
    606,938.40x = 910,407.60 × 407,872.80
  4. Step 4: Simplify right side
    606,938.40x = 371,330,496,953.28
  5. Step 5: Solve for x
    x = 371,330,496,953.28/606,938.40
  6. Step 6: Final answer
    x = 611,809.20

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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.