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Finding the Fourth Proportional to 710,436.08, 980,415.90 and 388,166.18

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Solution

The fourth proportional to 710,436.08, 980,415.90 and 388,166.18 is: 535,677.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,436.08 : 980,415.90 = 388,166.18 : x
  2. Step 2: Convert to fraction form
    710,436.08/980,415.90 = 388,166.18/x
  3. Step 3: Cross multiply
    710,436.08x = 980,415.90 × 388,166.18
  4. Step 4: Simplify right side
    710,436.08x = 380,564,289,812.18
  5. Step 5: Solve for x
    x = 380,564,289,812.18/710,436.08
  6. Step 6: Final answer
    x = 535,677.03

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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.