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Finding the Fourth Proportional to 572,076, 789,502.60 and 330,368.72

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Solution

The fourth proportional to 572,076, 789,502.60 and 330,368.72 is: 455,930.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,076 : 789,502.60 = 330,368.72 : x
  2. Step 2: Convert to fraction form
    572,076/789,502.60 = 330,368.72/x
  3. Step 3: Cross multiply
    572,076x = 789,502.60 × 330,368.72
  4. Step 4: Simplify right side
    572,076x = 260,826,963,398.67
  5. Step 5: Solve for x
    x = 260,826,963,398.67/572,076
  6. Step 6: Final answer
    x = 455,930.62

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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.