Home / 402,740.10-555,783.35-221,463.72

Finding the Fourth Proportional to 402,740.10, 555,783.35 and 221,463.72

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Solution

The fourth proportional to 402,740.10, 555,783.35 and 221,463.72 is: 305,621.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,740.10 : 555,783.35 = 221,463.72 : x
  2. Step 2: Convert to fraction form
    402,740.10/555,783.35 = 221,463.72/x
  3. Step 3: Cross multiply
    402,740.10x = 555,783.35 × 221,463.72
  4. Step 4: Simplify right side
    402,740.10x = 123,085,847,097.74
  5. Step 5: Solve for x
    x = 123,085,847,097.74/402,740.10
  6. Step 6: Final answer
    x = 305,621.04

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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.