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Finding the Fourth Proportional to 671,033.16, 925,720.65 and 398,946.47

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Solution

The fourth proportional to 671,033.16, 925,720.65 and 398,946.47 is: 550,364.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,033.16 : 925,720.65 = 398,946.47 : x
  2. Step 2: Convert to fraction form
    671,033.16/925,720.65 = 398,946.47/x
  3. Step 3: Cross multiply
    671,033.16x = 925,720.65 × 398,946.47
  4. Step 4: Simplify right side
    671,033.16x = 369,312,980,895.00
  5. Step 5: Solve for x
    x = 369,312,980,895.00/671,033.16
  6. Step 6: Final answer
    x = 550,364.73

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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.