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Finding the Fourth Proportional to 710,609.95, 980,639.73 and 388,322.09

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Solution

The fourth proportional to 710,609.95, 980,639.73 and 388,322.09 is: 535,883.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,609.95 : 980,639.73 = 388,322.09 : x
  2. Step 2: Convert to fraction form
    710,609.95/980,639.73 = 388,322.09/x
  3. Step 3: Cross multiply
    710,609.95x = 980,639.73 × 388,322.09
  4. Step 4: Simplify right side
    710,609.95x = 380,804,069,490.64
  5. Step 5: Solve for x
    x = 380,804,069,490.64/710,609.95
  6. Step 6: Final answer
    x = 535,883.39

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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.