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Finding the Fourth Proportional to 421,527.02, 581,776.16 and 313,349.90

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Solution

The fourth proportional to 421,527.02, 581,776.16 and 313,349.90 is: 432,474.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,527.02 : 581,776.16 = 313,349.90 : x
  2. Step 2: Convert to fraction form
    421,527.02/581,776.16 = 313,349.90/x
  3. Step 3: Cross multiply
    421,527.02x = 581,776.16 × 313,349.90
  4. Step 4: Simplify right side
    421,527.02x = 182,299,497,082.75
  5. Step 5: Solve for x
    x = 182,299,497,082.75/421,527.02
  6. Step 6: Final answer
    x = 432,474.05

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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.