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Finding the Fourth Proportional to 530,187.58, 731,636.89 and 288,471.07

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Solution

The fourth proportional to 530,187.58, 731,636.89 and 288,471.07 is: 398,078.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,187.58 : 731,636.89 = 288,471.07 : x
  2. Step 2: Convert to fraction form
    530,187.58/731,636.89 = 288,471.07/x
  3. Step 3: Cross multiply
    530,187.58x = 731,636.89 × 288,471.07
  4. Step 4: Simplify right side
    530,187.58x = 211,056,076,509.77
  5. Step 5: Solve for x
    x = 211,056,076,509.77/530,187.58
  6. Step 6: Final answer
    x = 398,078.12

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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.