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Finding the Fourth Proportional to 654,401.80, 981,602.70 and 402,459.40

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Solution

The fourth proportional to 654,401.80, 981,602.70 and 402,459.40 is: 603,689.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,401.80 : 981,602.70 = 402,459.40 : x
  2. Step 2: Convert to fraction form
    654,401.80/981,602.70 = 402,459.40/x
  3. Step 3: Cross multiply
    654,401.80x = 981,602.70 × 402,459.40
  4. Step 4: Simplify right side
    654,401.80x = 395,055,233,680.38
  5. Step 5: Solve for x
    x = 395,055,233,680.38/654,401.80
  6. Step 6: Final answer
    x = 603,689.10

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.