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Finding the Fourth Proportional to 710,274.12, 980,140.80 and 387,979.56

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Solution

The fourth proportional to 710,274.12, 980,140.80 and 387,979.56 is: 535,391.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,274.12 : 980,140.80 = 387,979.56 : x
  2. Step 2: Convert to fraction form
    710,274.12/980,140.80 = 387,979.56/x
  3. Step 3: Cross multiply
    710,274.12x = 980,140.80 × 387,979.56
  4. Step 4: Simplify right side
    710,274.12x = 380,274,596,322.05
  5. Step 5: Solve for x
    x = 380,274,596,322.05/710,274.12
  6. Step 6: Final answer
    x = 535,391.32

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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.