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Finding the Fourth Proportional to 315,477.70, 473,216.55 and 289,672.90

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Solution

The fourth proportional to 315,477.70, 473,216.55 and 289,672.90 is: 434,509.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,477.70 : 473,216.55 = 289,672.90 : x
  2. Step 2: Convert to fraction form
    315,477.70/473,216.55 = 289,672.90/x
  3. Step 3: Cross multiply
    315,477.70x = 473,216.55 × 289,672.90
  4. Step 4: Simplify right side
    315,477.70x = 137,078,010,366.50
  5. Step 5: Solve for x
    x = 137,078,010,366.50/315,477.70
  6. Step 6: Final answer
    x = 434,509.35

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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.