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Finding the Fourth Proportional to 390,803.60, 586,205.40 and 367,475.60

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Solution

The fourth proportional to 390,803.60, 586,205.40 and 367,475.60 is: 551,213.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,803.60 : 586,205.40 = 367,475.60 : x
  2. Step 2: Convert to fraction form
    390,803.60/586,205.40 = 367,475.60/x
  3. Step 3: Cross multiply
    390,803.60x = 586,205.40 × 367,475.60
  4. Step 4: Simplify right side
    390,803.60x = 215,416,181,088.24
  5. Step 5: Solve for x
    x = 215,416,181,088.24/390,803.60
  6. Step 6: Final answer
    x = 551,213.40

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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.