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Finding the Fourth Proportional to 421,365.58, 581,342.05 and 239,948.89

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Solution

The fourth proportional to 421,365.58, 581,342.05 and 239,948.89 is: 331,048.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,365.58 : 581,342.05 = 239,948.89 : x
  2. Step 2: Convert to fraction form
    421,365.58/581,342.05 = 239,948.89/x
  3. Step 3: Cross multiply
    421,365.58x = 581,342.05 × 239,948.89
  4. Step 4: Simplify right side
    421,365.58x = 139,492,379,607.83
  5. Step 5: Solve for x
    x = 139,492,379,607.83/421,365.58
  6. Step 6: Final answer
    x = 331,048.35

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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.