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Finding the Fourth Proportional to 710,320, 980,229.29 and 388,021.81

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Solution

The fourth proportional to 710,320, 980,229.29 and 388,021.81 is: 535,463.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,320 : 980,229.29 = 388,021.81 : x
  2. Step 2: Convert to fraction form
    710,320/980,229.29 = 388,021.81/x
  3. Step 3: Cross multiply
    710,320x = 980,229.29 × 388,021.81
  4. Step 4: Simplify right side
    710,320x = 380,350,343,320.82
  5. Step 5: Solve for x
    x = 380,350,343,320.82/710,320
  6. Step 6: Final answer
    x = 535,463.37

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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.