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Finding the Fourth Proportional to 545,090.40, 817,635.60 and 426,862.80

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Solution

The fourth proportional to 545,090.40, 817,635.60 and 426,862.80 is: 640,294.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,090.40 : 817,635.60 = 426,862.80 : x
  2. Step 2: Convert to fraction form
    545,090.40/817,635.60 = 426,862.80/x
  3. Step 3: Cross multiply
    545,090.40x = 817,635.60 × 426,862.80
  4. Step 4: Simplify right side
    545,090.40x = 349,018,221,595.68
  5. Step 5: Solve for x
    x = 349,018,221,595.68/545,090.40
  6. Step 6: Final answer
    x = 640,294.20

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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.