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Finding the Fourth Proportional to 265,407.90, 398,889.45 and 260,742.30

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Solution

The fourth proportional to 265,407.90, 398,889.45 and 260,742.30 is: 391,877.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,407.90 : 398,889.45 = 260,742.30 : x
  2. Step 2: Convert to fraction form
    265,407.90/398,889.45 = 260,742.30/x
  3. Step 3: Cross multiply
    265,407.90x = 398,889.45 × 260,742.30
  4. Step 4: Simplify right side
    265,407.90x = 104,007,352,638.74
  5. Step 5: Solve for x
    x = 104,007,352,638.74/265,407.90
  6. Step 6: Final answer
    x = 391,877.38

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1.5x scale

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.