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Finding the Fourth Proportional to 261,640.77, 392,448.85 and 153,630.31

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Solution

The fourth proportional to 261,640.77, 392,448.85 and 153,630.31 is: 230,438.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,640.77 : 392,448.85 = 153,630.31 : x
  2. Step 2: Convert to fraction form
    261,640.77/392,448.85 = 153,630.31/x
  3. Step 3: Cross multiply
    261,640.77x = 392,448.85 × 153,630.31
  4. Step 4: Simplify right side
    261,640.77x = 60,292,038,484.64
  5. Step 5: Solve for x
    x = 60,292,038,484.64/261,640.77
  6. Step 6: Final answer
    x = 230,438.24

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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.