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Finding the Fourth Proportional to 571,915.40, 857,289.90 and 335,136.20

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Solution

The fourth proportional to 571,915.40, 857,289.90 and 335,136.20 is: 502,362.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,915.40 : 857,289.90 = 335,136.20 : x
  2. Step 2: Convert to fraction form
    571,915.40/857,289.90 = 335,136.20/x
  3. Step 3: Cross multiply
    571,915.40x = 857,289.90 × 335,136.20
  4. Step 4: Simplify right side
    571,915.40x = 287,308,879,384.38
  5. Step 5: Solve for x
    x = 287,308,879,384.38/571,915.40
  6. Step 6: Final answer
    x = 502,362.55

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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.