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Finding the Fourth Proportional to 710,463.49, 980,428.01 and 388,166.65

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Solution

The fourth proportional to 710,463.49, 980,428.01 and 388,166.65 is: 535,663.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,463.49 : 980,428.01 = 388,166.65 : x
  2. Step 2: Convert to fraction form
    710,463.49/980,428.01 = 388,166.65/x
  3. Step 3: Cross multiply
    710,463.49x = 980,428.01 × 388,166.65
  4. Step 4: Simplify right side
    710,463.49x = 380,569,454,727.21
  5. Step 5: Solve for x
    x = 380,569,454,727.21/710,463.49
  6. Step 6: Final answer
    x = 535,663.64

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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.