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Finding the Fourth Proportional to 670,742.66, 925,319.54 and 398,655.94

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Solution

The fourth proportional to 670,742.66, 925,319.54 and 398,655.94 is: 549,963.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,742.66 : 925,319.54 = 398,655.94 : x
  2. Step 2: Convert to fraction form
    670,742.66/925,319.54 = 398,655.94/x
  3. Step 3: Cross multiply
    670,742.66x = 925,319.54 × 398,655.94
  4. Step 4: Simplify right side
    670,742.66x = 368,884,131,019.07
  5. Step 5: Solve for x
    x = 368,884,131,019.07/670,742.66
  6. Step 6: Final answer
    x = 549,963.72

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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.