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Finding the Fourth Proportional to 421,395.39, 581,527.88 and 230,408.79

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Solution

The fourth proportional to 421,395.39, 581,527.88 and 230,408.79 is: 317,965.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,395.39 : 581,527.88 = 230,408.79 : x
  2. Step 2: Convert to fraction form
    421,395.39/581,527.88 = 230,408.79/x
  3. Step 3: Cross multiply
    421,395.39x = 581,527.88 × 230,408.79
  4. Step 4: Simplify right side
    421,395.39x = 133,989,134,030.02
  5. Step 5: Solve for x
    x = 133,989,134,030.02/421,395.39
  6. Step 6: Final answer
    x = 317,965.35

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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.