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Finding the Fourth Proportional to 553,577.94, 763,779.51 and 311,775.93

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Solution

The fourth proportional to 553,577.94, 763,779.51 and 311,775.93 is: 430,161.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,577.94 : 763,779.51 = 311,775.93 : x
  2. Step 2: Convert to fraction form
    553,577.94/763,779.51 = 311,775.93/x
  3. Step 3: Cross multiply
    553,577.94x = 763,779.51 × 311,775.93
  4. Step 4: Simplify right side
    553,577.94x = 238,128,067,045.19
  5. Step 5: Solve for x
    x = 238,128,067,045.19/553,577.94
  6. Step 6: Final answer
    x = 430,161.77

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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.