Home / 2,478.34-3,420.08-1,430.38

Finding the Fourth Proportional to 2,478.34, 3,420.08 and 1,430.38

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Solution

The fourth proportional to 2,478.34, 3,420.08 and 1,430.38 is: 1,973.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,478.34 : 3,420.08 = 1,430.38 : x
  2. Step 2: Convert to fraction form
    2,478.34/3,420.08 = 1,430.38/x
  3. Step 3: Cross multiply
    2,478.34x = 3,420.08 × 1,430.38
  4. Step 4: Simplify right side
    2,478.34x = 4,891,996.93
  5. Step 5: Solve for x
    x = 4,891,996.93/2,478.34
  6. Step 6: Final answer
    x = 1,973.90

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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.