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Finding the Fourth Proportional to 390,803.80, 586,205.70 and 364,559.80

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Solution

The fourth proportional to 390,803.80, 586,205.70 and 364,559.80 is: 546,839.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,803.80 : 586,205.70 = 364,559.80 : x
  2. Step 2: Convert to fraction form
    390,803.80/586,205.70 = 364,559.80/x
  3. Step 3: Cross multiply
    390,803.80x = 586,205.70 × 364,559.80
  4. Step 4: Simplify right side
    390,803.80x = 213,707,032,750.86
  5. Step 5: Solve for x
    x = 213,707,032,750.86/390,803.80
  6. Step 6: Final answer
    x = 546,839.70

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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.