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Finding the Fourth Proportional to 919,408.80, 1,376,002.80 and 807,434.40

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Solution

The fourth proportional to 919,408.80, 1,376,002.80 and 807,434.40 is: 1,208,420.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,408.80 : 1,376,002.80 = 807,434.40 : x
  2. Step 2: Convert to fraction form
    919,408.80/1,376,002.80 = 807,434.40/x
  3. Step 3: Cross multiply
    919,408.80x = 1,376,002.80 × 807,434.40
  4. Step 4: Simplify right side
    919,408.80x = 1,111,031,995,216.32
  5. Step 5: Solve for x
    x = 1,111,031,995,216.32/919,408.80
  6. Step 6: Final answer
    x = 1,208,420.01

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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.