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Finding the Fourth Proportional to 578,686.40, 868,288.80 and 262,980.80

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Solution

The fourth proportional to 578,686.40, 868,288.80 and 262,980.80 is: 394,588.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,686.40 : 868,288.80 = 262,980.80 : x
  2. Step 2: Convert to fraction form
    578,686.40/868,288.80 = 262,980.80/x
  3. Step 3: Cross multiply
    578,686.40x = 868,288.80 × 262,980.80
  4. Step 4: Simplify right side
    578,686.40x = 228,343,283,255.04
  5. Step 5: Solve for x
    x = 228,343,283,255.04/578,686.40
  6. Step 6: Final answer
    x = 394,588.99

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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.