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Finding the Fourth Proportional to 670,741.92, 925,318.51 and 398,655.20

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Solution

The fourth proportional to 670,741.92, 925,318.51 and 398,655.20 is: 549,962.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,741.92 : 925,318.51 = 398,655.20 : x
  2. Step 2: Convert to fraction form
    670,741.92/925,318.51 = 398,655.20/x
  3. Step 3: Cross multiply
    670,741.92x = 925,318.51 × 398,655.20
  4. Step 4: Simplify right side
    670,741.92x = 368,883,036,984.41
  5. Step 5: Solve for x
    x = 368,883,036,984.41/670,741.92
  6. Step 6: Final answer
    x = 549,962.70

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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.