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Finding the Fourth Proportional to 539,089.90, 808,634.85 and 371,128.30

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Solution

The fourth proportional to 539,089.90, 808,634.85 and 371,128.30 is: 556,692.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,089.90 : 808,634.85 = 371,128.30 : x
  2. Step 2: Convert to fraction form
    539,089.90/808,634.85 = 371,128.30/x
  3. Step 3: Cross multiply
    539,089.90x = 808,634.85 × 371,128.30
  4. Step 4: Simplify right side
    539,089.90x = 300,107,277,201.26
  5. Step 5: Solve for x
    x = 300,107,277,201.26/539,089.90
  6. Step 6: Final answer
    x = 556,692.45

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.