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Finding the Fourth Proportional to 561,038.02, 774,235.30 and 306,389.20

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Solution

The fourth proportional to 561,038.02, 774,235.30 and 306,389.20 is: 422,818.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,038.02 : 774,235.30 = 306,389.20 : x
  2. Step 2: Convert to fraction form
    561,038.02/774,235.30 = 306,389.20/x
  3. Step 3: Cross multiply
    561,038.02x = 774,235.30 × 306,389.20
  4. Step 4: Simplify right side
    561,038.02x = 237,217,334,178.76
  5. Step 5: Solve for x
    x = 237,217,334,178.76/561,038.02
  6. Step 6: Final answer
    x = 422,818.64

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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.