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Finding the Fourth Proportional to 710,578.30, 980,586.16 and 388,280.97

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Solution

The fourth proportional to 710,578.30, 980,586.16 and 388,280.97 is: 535,821.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,578.30 : 980,586.16 = 388,280.97 : x
  2. Step 2: Convert to fraction form
    710,578.30/980,586.16 = 388,280.97/x
  3. Step 3: Cross multiply
    710,578.30x = 980,586.16 × 388,280.97
  4. Step 4: Simplify right side
    710,578.30x = 380,742,945,373.38
  5. Step 5: Solve for x
    x = 380,742,945,373.38/710,578.30
  6. Step 6: Final answer
    x = 535,821.24

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Double scale
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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.