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Finding the Fourth Proportional to 665,330.76, 918,156.96 and 359,407.08

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Solution

The fourth proportional to 665,330.76, 918,156.96 and 359,407.08 is: 495,982.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,330.76 : 918,156.96 = 359,407.08 : x
  2. Step 2: Convert to fraction form
    665,330.76/918,156.96 = 359,407.08/x
  3. Step 3: Cross multiply
    665,330.76x = 918,156.96 × 359,407.08
  4. Step 4: Simplify right side
    665,330.76x = 329,992,111,975.28
  5. Step 5: Solve for x
    x = 329,992,111,975.28/665,330.76
  6. Step 6: Final answer
    x = 495,982.05

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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.