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Finding the Fourth Proportional to 566,485.92, 781,778.64 and 311,834.40

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Solution

The fourth proportional to 566,485.92, 781,778.64 and 311,834.40 is: 430,346.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    566,485.92 : 781,778.64 = 311,834.40 : x
  2. Step 2: Convert to fraction form
    566,485.92/781,778.64 = 311,834.40/x
  3. Step 3: Cross multiply
    566,485.92x = 781,778.64 × 311,834.40
  4. Step 4: Simplify right side
    566,485.92x = 243,785,473,137.22
  5. Step 5: Solve for x
    x = 243,785,473,137.22/566,485.92
  6. Step 6: Final answer
    x = 430,346.92

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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.