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Finding the Fourth Proportional to 659,607.21, 910,280.30 and 387,671.18

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Solution

The fourth proportional to 659,607.21, 910,280.30 and 387,671.18 is: 534,999.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,607.21 : 910,280.30 = 387,671.18 : x
  2. Step 2: Convert to fraction form
    659,607.21/910,280.30 = 387,671.18/x
  3. Step 3: Cross multiply
    659,607.21x = 910,280.30 × 387,671.18
  4. Step 4: Simplify right side
    659,607.21x = 352,889,431,542.00
  5. Step 5: Solve for x
    x = 352,889,431,542.00/659,607.21
  6. Step 6: Final answer
    x = 534,999.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.