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Finding the Fourth Proportional to 572,072.96, 789,605.80 and 390,858.12

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Solution

The fourth proportional to 572,072.96, 789,605.80 and 390,858.12 is: 539,483.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,072.96 : 789,605.80 = 390,858.12 : x
  2. Step 2: Convert to fraction form
    572,072.96/789,605.80 = 390,858.12/x
  3. Step 3: Cross multiply
    572,072.96x = 789,605.80 × 390,858.12
  4. Step 4: Simplify right side
    572,072.96x = 308,623,838,529.10
  5. Step 5: Solve for x
    x = 308,623,838,529.10/572,072.96
  6. Step 6: Final answer
    x = 539,483.35

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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.