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Finding the Fourth Proportional to 521,420.85, 731,038.95 and 521,420.85

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Solution

The fourth proportional to 521,420.85, 731,038.95 and 521,420.85 is: 731,038.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,420.85 : 731,038.95 = 521,420.85 : x
  2. Step 2: Convert to fraction form
    521,420.85/731,038.95 = 521,420.85/x
  3. Step 3: Cross multiply
    521,420.85x = 731,038.95 × 521,420.85
  4. Step 4: Simplify right side
    521,420.85x = 381,178,950,692.11
  5. Step 5: Solve for x
    x = 381,178,950,692.11/521,420.85
  6. Step 6: Final answer
    x = 731,038.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.