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Finding the Fourth Proportional to 402,671.35, 555,686.82 and 221,386.36

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Solution

The fourth proportional to 402,671.35, 555,686.82 and 221,386.36 is: 305,513.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,671.35 : 555,686.82 = 221,386.36 : x
  2. Step 2: Convert to fraction form
    402,671.35/555,686.82 = 221,386.36/x
  3. Step 3: Cross multiply
    402,671.35x = 555,686.82 × 221,386.36
  4. Step 4: Simplify right side
    402,671.35x = 123,021,482,379.78
  5. Step 5: Solve for x
    x = 123,021,482,379.78/402,671.35
  6. Step 6: Final answer
    x = 305,513.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.