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Finding the Fourth Proportional to 628,616.72, 867,509.46 and 342,155.36

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Solution

The fourth proportional to 628,616.72, 867,509.46 and 342,155.36 is: 472,184.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,616.72 : 867,509.46 = 342,155.36 : x
  2. Step 2: Convert to fraction form
    628,616.72/867,509.46 = 342,155.36/x
  3. Step 3: Cross multiply
    628,616.72x = 867,509.46 × 342,155.36
  4. Step 4: Simplify right side
    628,616.72x = 296,823,011,589.71
  5. Step 5: Solve for x
    x = 296,823,011,589.71/628,616.72
  6. Step 6: Final answer
    x = 472,184.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.