Home / 578,021.20-867,031.80-459,048.40

Finding the Fourth Proportional to 578,021.20, 867,031.80 and 459,048.40

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Solution

The fourth proportional to 578,021.20, 867,031.80 and 459,048.40 is: 688,572.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,021.20 : 867,031.80 = 459,048.40 : x
  2. Step 2: Convert to fraction form
    578,021.20/867,031.80 = 459,048.40/x
  3. Step 3: Cross multiply
    578,021.20x = 867,031.80 × 459,048.40
  4. Step 4: Simplify right side
    578,021.20x = 398,009,560,539.12
  5. Step 5: Solve for x
    x = 398,009,560,539.12/578,021.20
  6. Step 6: Final answer
    x = 688,572.60

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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.