Home / 388,938.20-583,407.30-355,695.80

Finding the Fourth Proportional to 388,938.20, 583,407.30 and 355,695.80

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Solution

The fourth proportional to 388,938.20, 583,407.30 and 355,695.80 is: 533,543.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,938.20 : 583,407.30 = 355,695.80 : x
  2. Step 2: Convert to fraction form
    388,938.20/583,407.30 = 355,695.80/x
  3. Step 3: Cross multiply
    388,938.20x = 583,407.30 × 355,695.80
  4. Step 4: Simplify right side
    388,938.20x = 207,515,526,299.34
  5. Step 5: Solve for x
    x = 207,515,526,299.34/388,938.20
  6. Step 6: Final answer
    x = 533,543.70

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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.