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Finding the Fourth Proportional to 687,313.96, 948,430.02 and 385,449.64

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Solution

The fourth proportional to 687,313.96, 948,430.02 and 385,449.64 is: 531,885.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,313.96 : 948,430.02 = 385,449.64 : x
  2. Step 2: Convert to fraction form
    687,313.96/948,430.02 = 385,449.64/x
  3. Step 3: Cross multiply
    687,313.96x = 948,430.02 × 385,449.64
  4. Step 4: Simplify right side
    687,313.96x = 365,572,009,774.19
  5. Step 5: Solve for x
    x = 365,572,009,774.19/687,313.96
  6. Step 6: Final answer
    x = 531,885.04

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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.