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Finding the Fourth Proportional to 615,814.80, 860,041.20 and 615,814.80

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Solution

The fourth proportional to 615,814.80, 860,041.20 and 615,814.80 is: 860,041.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,814.80 : 860,041.20 = 615,814.80 : x
  2. Step 2: Convert to fraction form
    615,814.80/860,041.20 = 615,814.80/x
  3. Step 3: Cross multiply
    615,814.80x = 860,041.20 × 615,814.80
  4. Step 4: Simplify right side
    615,814.80x = 529,626,099,569.76
  5. Step 5: Solve for x
    x = 529,626,099,569.76/615,814.80
  6. Step 6: Final answer
    x = 860,041.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.