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Finding the Fourth Proportional to 710,485.16, 980,440.70 and 388,206.41

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Solution

The fourth proportional to 710,485.16, 980,440.70 and 388,206.41 is: 535,709.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,485.16 : 980,440.70 = 388,206.41 : x
  2. Step 2: Convert to fraction form
    710,485.16/980,440.70 = 388,206.41/x
  3. Step 3: Cross multiply
    710,485.16x = 980,440.70 × 388,206.41
  4. Step 4: Simplify right side
    710,485.16x = 380,613,357,521.65
  5. Step 5: Solve for x
    x = 380,613,357,521.65/710,485.16
  6. Step 6: Final answer
    x = 535,709.09

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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.