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Finding the Fourth Proportional to 710,178.86, 980,046.82 and 387,889.72

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Solution

The fourth proportional to 710,178.86, 980,046.82 and 387,889.72 is: 535,287.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,178.86 : 980,046.82 = 387,889.72 : x
  2. Step 2: Convert to fraction form
    710,178.86/980,046.82 = 387,889.72/x
  3. Step 3: Cross multiply
    710,178.86x = 980,046.82 × 387,889.72
  4. Step 4: Simplify right side
    710,178.86x = 380,150,084,631.44
  5. Step 5: Solve for x
    x = 380,150,084,631.44/710,178.86
  6. Step 6: Final answer
    x = 535,287.81

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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.