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Finding the Fourth Proportional to 685,088.55, 945,402.64 and 379,177.47

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Solution

The fourth proportional to 685,088.55, 945,402.64 and 379,177.47 is: 523,254.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,088.55 : 945,402.64 = 379,177.47 : x
  2. Step 2: Convert to fraction form
    685,088.55/945,402.64 = 379,177.47/x
  3. Step 3: Cross multiply
    685,088.55x = 945,402.64 × 379,177.47
  4. Step 4: Simplify right side
    685,088.55x = 358,475,380,218.58
  5. Step 5: Solve for x
    x = 358,475,380,218.58/685,088.55
  6. Step 6: Final answer
    x = 523,254.08

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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.