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Finding the Fourth Proportional to 361,875.40, 542,813.10 and 321,785.80

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Solution

The fourth proportional to 361,875.40, 542,813.10 and 321,785.80 is: 482,678.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,875.40 : 542,813.10 = 321,785.80 : x
  2. Step 2: Convert to fraction form
    361,875.40/542,813.10 = 321,785.80/x
  3. Step 3: Cross multiply
    361,875.40x = 542,813.10 × 321,785.80
  4. Step 4: Simplify right side
    361,875.40x = 174,669,547,633.98
  5. Step 5: Solve for x
    x = 174,669,547,633.98/361,875.40
  6. Step 6: Final answer
    x = 482,678.70

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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.