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Finding the Fourth Proportional to 611,939.52, 917,130.42 and 345,848.40

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Solution

The fourth proportional to 611,939.52, 917,130.42 and 345,848.40 is: 518,332.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,939.52 : 917,130.42 = 345,848.40 : x
  2. Step 2: Convert to fraction form
    611,939.52/917,130.42 = 345,848.40/x
  3. Step 3: Cross multiply
    611,939.52x = 917,130.42 × 345,848.40
  4. Step 4: Simplify right side
    611,939.52x = 317,188,088,348.33
  5. Step 5: Solve for x
    x = 317,188,088,348.33/611,939.52
  6. Step 6: Final answer
    x = 518,332.41

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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.