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Finding the Fourth Proportional to 280,640.48, 387,292.32 and 153,324.32

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Solution

The fourth proportional to 280,640.48, 387,292.32 and 153,324.32 is: 211,592.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,640.48 : 387,292.32 = 153,324.32 : x
  2. Step 2: Convert to fraction form
    280,640.48/387,292.32 = 153,324.32/x
  3. Step 3: Cross multiply
    280,640.48x = 387,292.32 × 153,324.32
  4. Step 4: Simplify right side
    280,640.48x = 59,381,331,605.22
  5. Step 5: Solve for x
    x = 59,381,331,605.22/280,640.48
  6. Step 6: Final answer
    x = 211,592.18

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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.