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Finding the Fourth Proportional to 387,692.82, 535,019.04 and 215,613.18

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Solution

The fourth proportional to 387,692.82, 535,019.04 and 215,613.18 is: 297,547.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,692.82 : 535,019.04 = 215,613.18 : x
  2. Step 2: Convert to fraction form
    387,692.82/535,019.04 = 215,613.18/x
  3. Step 3: Cross multiply
    387,692.82x = 535,019.04 × 215,613.18
  4. Step 4: Simplify right side
    387,692.82x = 115,357,156,574.95
  5. Step 5: Solve for x
    x = 115,357,156,574.95/387,692.82
  6. Step 6: Final answer
    x = 297,547.83

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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.