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Finding the Fourth Proportional to 659,456.80, 989,768.40 and 564,978.40

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Solution

The fourth proportional to 659,456.80, 989,768.40 and 564,978.40 is: 847,967.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,456.80 : 989,768.40 = 564,978.40 : x
  2. Step 2: Convert to fraction form
    659,456.80/989,768.40 = 564,978.40/x
  3. Step 3: Cross multiply
    659,456.80x = 989,768.40 × 564,978.40
  4. Step 4: Simplify right side
    659,456.80x = 559,197,767,002.56
  5. Step 5: Solve for x
    x = 559,197,767,002.56/659,456.80
  6. Step 6: Final answer
    x = 847,967.25

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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.