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Finding the Fourth Proportional to 710,598.42, 980,638.65 and 388,322.10

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Solution

The fourth proportional to 710,598.42, 980,638.65 and 388,322.10 is: 535,891.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,598.42 : 980,638.65 = 388,322.10 : x
  2. Step 2: Convert to fraction form
    710,598.42/980,638.65 = 388,322.10/x
  3. Step 3: Cross multiply
    710,598.42x = 980,638.65 × 388,322.10
  4. Step 4: Simplify right side
    710,598.42x = 380,803,659,909.17
  5. Step 5: Solve for x
    x = 380,803,659,909.17/710,598.42
  6. Step 6: Final answer
    x = 535,891.51

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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.