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Finding the Fourth Proportional to 3,430.64, 4,721.64 and 2,925.20

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Solution

The fourth proportional to 3,430.64, 4,721.64 and 2,925.20 is: 4,026.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,430.64 : 4,721.64 = 2,925.20 : x
  2. Step 2: Convert to fraction form
    3,430.64/4,721.64 = 2,925.20/x
  3. Step 3: Cross multiply
    3,430.64x = 4,721.64 × 2,925.20
  4. Step 4: Simplify right side
    3,430.64x = 13,811,741.33
  5. Step 5: Solve for x
    x = 13,811,741.33/3,430.64
  6. Step 6: Final answer
    x = 4,026.00

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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.