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Finding the Fourth Proportional to 404,312.80, 605,302.80 and 392,648.80

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Solution

The fourth proportional to 404,312.80, 605,302.80 and 392,648.80 is: 587,840.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,312.80 : 605,302.80 = 392,648.80 : x
  2. Step 2: Convert to fraction form
    404,312.80/605,302.80 = 392,648.80/x
  3. Step 3: Cross multiply
    404,312.80x = 605,302.80 × 392,648.80
  4. Step 4: Simplify right side
    404,312.80x = 237,671,418,056.64
  5. Step 5: Solve for x
    x = 237,671,418,056.64/404,312.80
  6. Step 6: Final answer
    x = 587,840.45

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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.