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Finding the Fourth Proportional to 1,178,559, 1,626,411.42 and 642,015

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Solution

The fourth proportional to 1,178,559, 1,626,411.42 and 642,015 is: 885,980.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178,559 : 1,626,411.42 = 642,015 : x
  2. Step 2: Convert to fraction form
    1,178,559/1,626,411.42 = 642,015/x
  3. Step 3: Cross multiply
    1,178,559x = 1,626,411.42 × 642,015
  4. Step 4: Simplify right side
    1,178,559x = 1,044,180,527,811.30
  5. Step 5: Solve for x
    x = 1,044,180,527,811.30/1,178,559
  6. Step 6: Final answer
    x = 885,980.70

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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.