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Finding the Fourth Proportional to 916,375.40, 1,374,908.70 and 443,479.40

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Solution

The fourth proportional to 916,375.40, 1,374,908.70 and 443,479.40 is: 665,386.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    916,375.40 : 1,374,908.70 = 443,479.40 : x
  2. Step 2: Convert to fraction form
    916,375.40/1,374,908.70 = 443,479.40/x
  3. Step 3: Cross multiply
    916,375.40x = 1,374,908.70 × 443,479.40
  4. Step 4: Simplify right side
    916,375.40x = 609,743,685,330.78
  5. Step 5: Solve for x
    x = 609,743,685,330.78/916,375.40
  6. Step 6: Final answer
    x = 665,386.35

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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.