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Finding the Fourth Proportional to 522,642.40, 721,555.70 and 329,215.92

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Solution

The fourth proportional to 522,642.40, 721,555.70 and 329,215.92 is: 454,512.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,642.40 : 721,555.70 = 329,215.92 : x
  2. Step 2: Convert to fraction form
    522,642.40/721,555.70 = 329,215.92/x
  3. Step 3: Cross multiply
    522,642.40x = 721,555.70 × 329,215.92
  4. Step 4: Simplify right side
    522,642.40x = 237,547,621,284.21
  5. Step 5: Solve for x
    x = 237,547,621,284.21/522,642.40
  6. Step 6: Final answer
    x = 454,512.72

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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.