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Finding the Fourth Proportional to 520,740.81, 718,588.42 and 291,258.34

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Solution

The fourth proportional to 520,740.81, 718,588.42 and 291,258.34 is: 401,917.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,740.81 : 718,588.42 = 291,258.34 : x
  2. Step 2: Convert to fraction form
    520,740.81/718,588.42 = 291,258.34/x
  3. Step 3: Cross multiply
    520,740.81x = 718,588.42 × 291,258.34
  4. Step 4: Simplify right side
    520,740.81x = 209,294,867,827.81
  5. Step 5: Solve for x
    x = 209,294,867,827.81/520,740.81
  6. Step 6: Final answer
    x = 401,917.54

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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.