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Finding the Fourth Proportional to 905,664, 1,358,703.36 and 314,688

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Solution

The fourth proportional to 905,664, 1,358,703.36 and 314,688 is: 472,104.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,664 : 1,358,703.36 = 314,688 : x
  2. Step 2: Convert to fraction form
    905,664/1,358,703.36 = 314,688/x
  3. Step 3: Cross multiply
    905,664x = 1,358,703.36 × 314,688
  4. Step 4: Simplify right side
    905,664x = 427,567,642,951.68
  5. Step 5: Solve for x
    x = 427,567,642,951.68/905,664
  6. Step 6: Final answer
    x = 472,104.05

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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.