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Finding the Fourth Proportional to 427,243.20, 640,864.80 and 357,777.60

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Solution

The fourth proportional to 427,243.20, 640,864.80 and 357,777.60 is: 536,666.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,243.20 : 640,864.80 = 357,777.60 : x
  2. Step 2: Convert to fraction form
    427,243.20/640,864.80 = 357,777.60/x
  3. Step 3: Cross multiply
    427,243.20x = 640,864.80 × 357,777.60
  4. Step 4: Simplify right side
    427,243.20x = 229,287,070,068.48
  5. Step 5: Solve for x
    x = 229,287,070,068.48/427,243.20
  6. Step 6: Final answer
    x = 536,666.40

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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.