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Finding the Fourth Proportional to 487,686.80, 730,104.60 and 347,718.80

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Solution

The fourth proportional to 487,686.80, 730,104.60 and 347,718.80 is: 520,561.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,686.80 : 730,104.60 = 347,718.80 : x
  2. Step 2: Convert to fraction form
    487,686.80/730,104.60 = 347,718.80/x
  3. Step 3: Cross multiply
    487,686.80x = 730,104.60 × 347,718.80
  4. Step 4: Simplify right side
    487,686.80x = 253,871,095,386.48
  5. Step 5: Solve for x
    x = 253,871,095,386.48/487,686.80
  6. Step 6: Final answer
    x = 520,561.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.