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Finding the Fourth Proportional to 459,345.40, 687,462.90 and 403,358.20

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Solution

The fourth proportional to 459,345.40, 687,462.90 and 403,358.20 is: 603,671.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,345.40 : 687,462.90 = 403,358.20 : x
  2. Step 2: Convert to fraction form
    459,345.40/687,462.90 = 403,358.20/x
  3. Step 3: Cross multiply
    459,345.40x = 687,462.90 × 403,358.20
  4. Step 4: Simplify right side
    459,345.40x = 277,293,797,910.78
  5. Step 5: Solve for x
    x = 277,293,797,910.78/459,345.40
  6. Step 6: Final answer
    x = 603,671.66

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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.