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Finding the Fourth Proportional to 908,805.72, 1,363,485.44 and 429,401.65

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Solution

The fourth proportional to 908,805.72, 1,363,485.44 and 429,401.65 is: 644,233.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    908,805.72 : 1,363,485.44 = 429,401.65 : x
  2. Step 2: Convert to fraction form
    908,805.72/1,363,485.44 = 429,401.65/x
  3. Step 3: Cross multiply
    908,805.72x = 1,363,485.44 × 429,401.65
  4. Step 4: Simplify right side
    908,805.72x = 585,482,897,686.98
  5. Step 5: Solve for x
    x = 585,482,897,686.98/908,805.72
  6. Step 6: Final answer
    x = 644,233.29

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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.