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Finding the Fourth Proportional to 861,462.76, 1,188,676.74 and 479,479.72

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Solution

The fourth proportional to 861,462.76, 1,188,676.74 and 479,479.72 is: 661,603.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,462.76 : 1,188,676.74 = 479,479.72 : x
  2. Step 2: Convert to fraction form
    861,462.76/1,188,676.74 = 479,479.72/x
  3. Step 3: Cross multiply
    861,462.76x = 1,188,676.74 × 479,479.72
  4. Step 4: Simplify right side
    861,462.76x = 569,946,390,465.71
  5. Step 5: Solve for x
    x = 569,946,390,465.71/861,462.76
  6. Step 6: Final answer
    x = 661,603.05

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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.