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Finding the Fourth Proportional to 643,851.55, 888,512.95 and 353,455.89

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Solution

The fourth proportional to 643,851.55, 888,512.95 and 353,455.89 is: 487,767.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,851.55 : 888,512.95 = 353,455.89 : x
  2. Step 2: Convert to fraction form
    643,851.55/888,512.95 = 353,455.89/x
  3. Step 3: Cross multiply
    643,851.55x = 888,512.95 × 353,455.89
  4. Step 4: Simplify right side
    643,851.55x = 314,050,130,640.48
  5. Step 5: Solve for x
    x = 314,050,130,640.48/643,851.55
  6. Step 6: Final answer
    x = 487,767.92

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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.