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Finding the Fourth Proportional to 388,927.20, 583,390.80 and 355,684.80

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Solution

The fourth proportional to 388,927.20, 583,390.80 and 355,684.80 is: 533,527.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,927.20 : 583,390.80 = 355,684.80 : x
  2. Step 2: Convert to fraction form
    388,927.20/583,390.80 = 355,684.80/x
  3. Step 3: Cross multiply
    388,927.20x = 583,390.80 × 355,684.80
  4. Step 4: Simplify right side
    388,927.20x = 207,503,240,019.84
  5. Step 5: Solve for x
    x = 207,503,240,019.84/388,927.20
  6. Step 6: Final answer
    x = 533,527.20

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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.