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Finding the Fourth Proportional to 917,641.36, 1,266,483.04 and 660,370

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Solution

The fourth proportional to 917,641.36, 1,266,483.04 and 660,370 is: 911,409.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,641.36 : 1,266,483.04 = 660,370 : x
  2. Step 2: Convert to fraction form
    917,641.36/1,266,483.04 = 660,370/x
  3. Step 3: Cross multiply
    917,641.36x = 1,266,483.04 × 660,370
  4. Step 4: Simplify right side
    917,641.36x = 836,347,405,124.80
  5. Step 5: Solve for x
    x = 836,347,405,124.80/917,641.36
  6. Step 6: Final answer
    x = 911,409.88

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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.