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Finding the Fourth Proportional to 623,790.72, 860,051.28 and 520,573.68

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Solution

The fourth proportional to 623,790.72, 860,051.28 and 520,573.68 is: 717,740.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,790.72 : 860,051.28 = 520,573.68 : x
  2. Step 2: Convert to fraction form
    623,790.72/860,051.28 = 520,573.68/x
  3. Step 3: Cross multiply
    623,790.72x = 860,051.28 × 520,573.68
  4. Step 4: Simplify right side
    623,790.72x = 447,720,059,818.31
  5. Step 5: Solve for x
    x = 447,720,059,818.31/623,790.72
  6. Step 6: Final answer
    x = 717,740.82

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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.