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Finding the Fourth Proportional to 710,215.78, 980,091.25 and 387,925.78

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Solution

The fourth proportional to 710,215.78, 980,091.25 and 387,925.78 is: 535,334.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,215.78 : 980,091.25 = 387,925.78 : x
  2. Step 2: Convert to fraction form
    710,215.78/980,091.25 = 387,925.78/x
  3. Step 3: Cross multiply
    710,215.78x = 980,091.25 × 387,925.78
  4. Step 4: Simplify right side
    710,215.78x = 380,202,662,627.43
  5. Step 5: Solve for x
    x = 380,202,662,627.43/710,215.78
  6. Step 6: Final answer
    x = 535,334.01

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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.