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Finding the Fourth Proportional to 623,679.80, 860,899.32 and 369,030.38

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Solution

The fourth proportional to 623,679.80, 860,899.32 and 369,030.38 is: 509,392.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,679.80 : 860,899.32 = 369,030.38 : x
  2. Step 2: Convert to fraction form
    623,679.80/860,899.32 = 369,030.38/x
  3. Step 3: Cross multiply
    623,679.80x = 860,899.32 × 369,030.38
  4. Step 4: Simplify right side
    623,679.80x = 317,697,998,896.85
  5. Step 5: Solve for x
    x = 317,697,998,896.85/623,679.80
  6. Step 6: Final answer
    x = 509,392.80

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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.