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Finding the Fourth Proportional to 665,040.60, 997,560.90 and 578,435.40

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Solution

The fourth proportional to 665,040.60, 997,560.90 and 578,435.40 is: 867,653.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,040.60 : 997,560.90 = 578,435.40 : x
  2. Step 2: Convert to fraction form
    665,040.60/997,560.90 = 578,435.40/x
  3. Step 3: Cross multiply
    665,040.60x = 997,560.90 × 578,435.40
  4. Step 4: Simplify right side
    665,040.60x = 577,024,538,215.86
  5. Step 5: Solve for x
    x = 577,024,538,215.86/665,040.60
  6. Step 6: Final answer
    x = 867,653.10

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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.