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Finding the Fourth Proportional to 448,426.08, 672,639.12 and 426,002.40

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Solution

The fourth proportional to 448,426.08, 672,639.12 and 426,002.40 is: 639,003.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,426.08 : 672,639.12 = 426,002.40 : x
  2. Step 2: Convert to fraction form
    448,426.08/672,639.12 = 426,002.40/x
  3. Step 3: Cross multiply
    448,426.08x = 672,639.12 × 426,002.40
  4. Step 4: Simplify right side
    448,426.08x = 286,545,879,453.89
  5. Step 5: Solve for x
    x = 286,545,879,453.89/448,426.08
  6. Step 6: Final answer
    x = 639,003.60

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.