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Finding the Fourth Proportional to 1,678,904.49, 2,316,820.59 and 914,941.65

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Solution

The fourth proportional to 1,678,904.49, 2,316,820.59 and 914,941.65 is: 1,262,582.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678,904.49 : 2,316,820.59 = 914,941.65 : x
  2. Step 2: Convert to fraction form
    1,678,904.49/2,316,820.59 = 914,941.65/x
  3. Step 3: Cross multiply
    1,678,904.49x = 2,316,820.59 × 914,941.65
  4. Step 4: Simplify right side
    1,678,904.49x = 2,119,755,653,368.57
  5. Step 5: Solve for x
    x = 2,119,755,653,368.57/1,678,904.49
  6. Step 6: Final answer
    x = 1,262,582.63

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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.