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Finding the Fourth Proportional to 561,389.48, 774,708.36 and 306,735.20

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Solution

The fourth proportional to 561,389.48, 774,708.36 and 306,735.20 is: 423,289.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,389.48 : 774,708.36 = 306,735.20 : x
  2. Step 2: Convert to fraction form
    561,389.48/774,708.36 = 306,735.20/x
  3. Step 3: Cross multiply
    561,389.48x = 774,708.36 × 306,735.20
  4. Step 4: Simplify right side
    561,389.48x = 237,630,323,746.27
  5. Step 5: Solve for x
    x = 237,630,323,746.27/561,389.48
  6. Step 6: Final answer
    x = 423,289.59

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1.5x scale

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.