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Finding the Fourth Proportional to 719,721, 993,302.46 and 417,915

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Solution

The fourth proportional to 719,721, 993,302.46 and 417,915 is: 576,773.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,721 : 993,302.46 = 417,915 : x
  2. Step 2: Convert to fraction form
    719,721/993,302.46 = 417,915/x
  3. Step 3: Cross multiply
    719,721x = 993,302.46 × 417,915
  4. Step 4: Simplify right side
    719,721x = 415,115,997,570.90
  5. Step 5: Solve for x
    x = 415,115,997,570.90/719,721
  6. Step 6: Final answer
    x = 576,773.50

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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.