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Finding the Fourth Proportional to 1,678,909.86, 2,316,828.02 and 914,947.02

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Solution

The fourth proportional to 1,678,909.86, 2,316,828.02 and 914,947.02 is: 1,262,590.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678,909.86 : 2,316,828.02 = 914,947.02 : x
  2. Step 2: Convert to fraction form
    1,678,909.86/2,316,828.02 = 914,947.02/x
  3. Step 3: Cross multiply
    1,678,909.86x = 2,316,828.02 × 914,947.02
  4. Step 4: Simplify right side
    1,678,909.86x = 2,119,774,888,176.77
  5. Step 5: Solve for x
    x = 2,119,774,888,176.77/1,678,909.86
  6. Step 6: Final answer
    x = 1,262,590.05

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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.