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Finding the Fourth Proportional to 668,707.80, 1,003,061.70 and 402,331.20

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Solution

The fourth proportional to 668,707.80, 1,003,061.70 and 402,331.20 is: 603,496.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,707.80 : 1,003,061.70 = 402,331.20 : x
  2. Step 2: Convert to fraction form
    668,707.80/1,003,061.70 = 402,331.20/x
  3. Step 3: Cross multiply
    668,707.80x = 1,003,061.70 × 402,331.20
  4. Step 4: Simplify right side
    668,707.80x = 403,563,017,435.04
  5. Step 5: Solve for x
    x = 403,563,017,435.04/668,707.80
  6. Step 6: Final answer
    x = 603,496.80

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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.