Home / 648,008.20-972,012.30-512,705.80

Finding the Fourth Proportional to 648,008.20, 972,012.30 and 512,705.80

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Solution

The fourth proportional to 648,008.20, 972,012.30 and 512,705.80 is: 769,058.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,008.20 : 972,012.30 = 512,705.80 : x
  2. Step 2: Convert to fraction form
    648,008.20/972,012.30 = 512,705.80/x
  3. Step 3: Cross multiply
    648,008.20x = 972,012.30 × 512,705.80
  4. Step 4: Simplify right side
    648,008.20x = 498,356,343,881.34
  5. Step 5: Solve for x
    x = 498,356,343,881.34/648,008.20
  6. Step 6: Final answer
    x = 769,058.70

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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.