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Finding the Fourth Proportional to 314,981.80, 472,472.70 and 278,240.20

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Solution

The fourth proportional to 314,981.80, 472,472.70 and 278,240.20 is: 417,360.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    314,981.80 : 472,472.70 = 278,240.20 : x
  2. Step 2: Convert to fraction form
    314,981.80/472,472.70 = 278,240.20/x
  3. Step 3: Cross multiply
    314,981.80x = 472,472.70 × 278,240.20
  4. Step 4: Simplify right side
    314,981.80x = 131,460,898,542.54
  5. Step 5: Solve for x
    x = 131,460,898,542.54/314,981.80
  6. Step 6: Final answer
    x = 417,360.30

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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.