Home / 402,482.70-555,399.18-221,190.72

Finding the Fourth Proportional to 402,482.70, 555,399.18 and 221,190.72

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Solution

The fourth proportional to 402,482.70, 555,399.18 and 221,190.72 is: 305,228.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,482.70 : 555,399.18 = 221,190.72 : x
  2. Step 2: Convert to fraction form
    402,482.70/555,399.18 = 221,190.72/x
  3. Step 3: Cross multiply
    402,482.70x = 555,399.18 × 221,190.72
  4. Step 4: Simplify right side
    402,482.70x = 122,849,144,511.61
  5. Step 5: Solve for x
    x = 122,849,144,511.61/402,482.70
  6. Step 6: Final answer
    x = 305,228.39

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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.