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Finding the Fourth Proportional to 687,602.32, 948,907.56 and 385,818.64

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Solution

The fourth proportional to 687,602.32, 948,907.56 and 385,818.64 is: 532,438.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,602.32 : 948,907.56 = 385,818.64 : x
  2. Step 2: Convert to fraction form
    687,602.32/948,907.56 = 385,818.64/x
  3. Step 3: Cross multiply
    687,602.32x = 948,907.56 × 385,818.64
  4. Step 4: Simplify right side
    687,602.32x = 366,106,224,284.92
  5. Step 5: Solve for x
    x = 366,106,224,284.92/687,602.32
  6. Step 6: Final answer
    x = 532,438.90

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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.