Home / 918,243-1,376,575.65-319,126.32

Finding the Fourth Proportional to 918,243, 1,376,575.65 and 319,126.32

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Solution

The fourth proportional to 918,243, 1,376,575.65 and 319,126.32 is: 478,415.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,243 : 1,376,575.65 = 319,126.32 : x
  2. Step 2: Convert to fraction form
    918,243/1,376,575.65 = 319,126.32/x
  3. Step 3: Cross multiply
    918,243x = 1,376,575.65 × 319,126.32
  4. Step 4: Simplify right side
    918,243x = 439,301,521,386.11
  5. Step 5: Solve for x
    x = 439,301,521,386.11/918,243
  6. Step 6: Final answer
    x = 478,415.32

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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.