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Finding the Fourth Proportional to 710,213.78, 980,088.50 and 387,923.78

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Solution

The fourth proportional to 710,213.78, 980,088.50 and 387,923.78 is: 535,331.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,213.78 : 980,088.50 = 387,923.78 : x
  2. Step 2: Convert to fraction form
    710,213.78/980,088.50 = 387,923.78/x
  3. Step 3: Cross multiply
    710,213.78x = 980,088.50 × 387,923.78
  4. Step 4: Simplify right side
    710,213.78x = 380,199,628,814.47
  5. Step 5: Solve for x
    x = 380,199,628,814.47/710,213.78
  6. Step 6: Final answer
    x = 535,331.25

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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.