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Finding the Fourth Proportional to 654,046.40, 981,215.40 and 512,328.80

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Solution

The fourth proportional to 654,046.40, 981,215.40 and 512,328.80 is: 768,607.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,046.40 : 981,215.40 = 512,328.80 : x
  2. Step 2: Convert to fraction form
    654,046.40/981,215.40 = 512,328.80/x
  3. Step 3: Cross multiply
    654,046.40x = 981,215.40 × 512,328.80
  4. Step 4: Simplify right side
    654,046.40x = 502,704,908,423.52
  5. Step 5: Solve for x
    x = 502,704,908,423.52/654,046.40
  6. Step 6: Final answer
    x = 768,607.41

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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.