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Finding the Fourth Proportional to 709,692.72, 979,341.48 and 403,740.24

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Solution

The fourth proportional to 709,692.72, 979,341.48 and 403,740.24 is: 557,141.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,692.72 : 979,341.48 = 403,740.24 : x
  2. Step 2: Convert to fraction form
    709,692.72/979,341.48 = 403,740.24/x
  3. Step 3: Cross multiply
    709,692.72x = 979,341.48 × 403,740.24
  4. Step 4: Simplify right side
    709,692.72x = 395,399,564,177.16
  5. Step 5: Solve for x
    x = 395,399,564,177.16/709,692.72
  6. Step 6: Final answer
    x = 557,141.92

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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.