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Finding the Fourth Proportional to 563,980.32, 778,342.74 and 309,381.12

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Solution

The fourth proportional to 563,980.32, 778,342.74 and 309,381.12 is: 426,973.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,980.32 : 778,342.74 = 309,381.12 : x
  2. Step 2: Convert to fraction form
    563,980.32/778,342.74 = 309,381.12/x
  3. Step 3: Cross multiply
    563,980.32x = 778,342.74 × 309,381.12
  4. Step 4: Simplify right side
    563,980.32x = 240,804,548,645.07
  5. Step 5: Solve for x
    x = 240,804,548,645.07/563,980.32
  6. Step 6: Final answer
    x = 426,973.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.