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Finding the Fourth Proportional to 615,276.40, 923,060.40 and 315,803.20

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Solution

The fourth proportional to 615,276.40, 923,060.40 and 315,803.20 is: 473,779.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,276.40 : 923,060.40 = 315,803.20 : x
  2. Step 2: Convert to fraction form
    615,276.40/923,060.40 = 315,803.20/x
  3. Step 3: Cross multiply
    615,276.40x = 923,060.40 × 315,803.20
  4. Step 4: Simplify right side
    615,276.40x = 291,505,428,113.28
  5. Step 5: Solve for x
    x = 291,505,428,113.28/615,276.40
  6. Step 6: Final answer
    x = 473,779.63

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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.