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Finding the Fourth Proportional to 487,315.20, 729,660.60 and 487,315.20

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Solution

The fourth proportional to 487,315.20, 729,660.60 and 487,315.20 is: 729,660.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,315.20 : 729,660.60 = 487,315.20 : x
  2. Step 2: Convert to fraction form
    487,315.20/729,660.60 = 487,315.20/x
  3. Step 3: Cross multiply
    487,315.20x = 729,660.60 × 487,315.20
  4. Step 4: Simplify right side
    487,315.20x = 355,574,701,221.12
  5. Step 5: Solve for x
    x = 355,574,701,221.12/487,315.20
  6. Step 6: Final answer
    x = 729,660.60

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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.