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Finding the Fourth Proportional to 887,863.86, 1,225,256.85 and 485,455.86

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Solution

The fourth proportional to 887,863.86, 1,225,256.85 and 485,455.86 is: 669,931.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,863.86 : 1,225,256.85 = 485,455.86 : x
  2. Step 2: Convert to fraction form
    887,863.86/1,225,256.85 = 485,455.86/x
  3. Step 3: Cross multiply
    887,863.86x = 1,225,256.85 × 485,455.86
  4. Step 4: Simplify right side
    887,863.86x = 594,808,117,837.64
  5. Step 5: Solve for x
    x = 594,808,117,837.64/887,863.86
  6. Step 6: Final answer
    x = 669,931.67

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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.