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Finding the Fourth Proportional to 431,277.60, 646,916.40 and 385,658.40

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Solution

The fourth proportional to 431,277.60, 646,916.40 and 385,658.40 is: 578,487.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,277.60 : 646,916.40 = 385,658.40 : x
  2. Step 2: Convert to fraction form
    431,277.60/646,916.40 = 385,658.40/x
  3. Step 3: Cross multiply
    431,277.60x = 646,916.40 × 385,658.40
  4. Step 4: Simplify right side
    431,277.60x = 249,488,743,757.76
  5. Step 5: Solve for x
    x = 249,488,743,757.76/431,277.60
  6. Step 6: Final answer
    x = 578,487.60

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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.