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Finding the Fourth Proportional to 670,740.66, 925,316.78 and 398,653.94

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Solution

The fourth proportional to 670,740.66, 925,316.78 and 398,653.94 is: 549,960.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,740.66 : 925,316.78 = 398,653.94 : x
  2. Step 2: Convert to fraction form
    670,740.66/925,316.78 = 398,653.94/x
  3. Step 3: Cross multiply
    670,740.66x = 925,316.78 × 398,653.94
  4. Step 4: Simplify right side
    670,740.66x = 368,881,180,095.11
  5. Step 5: Solve for x
    x = 368,881,180,095.11/670,740.66
  6. Step 6: Final answer
    x = 549,960.96

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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.