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Finding the Fourth Proportional to 677,055.84, 934,314.12 and 390,568.56

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Solution

The fourth proportional to 677,055.84, 934,314.12 and 390,568.56 is: 538,971.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,055.84 : 934,314.12 = 390,568.56 : x
  2. Step 2: Convert to fraction form
    677,055.84/934,314.12 = 390,568.56/x
  3. Step 3: Cross multiply
    677,055.84x = 934,314.12 × 390,568.56
  4. Step 4: Simplify right side
    677,055.84x = 364,913,720,436.07
  5. Step 5: Solve for x
    x = 364,913,720,436.07/677,055.84
  6. Step 6: Final answer
    x = 538,971.38

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Double scale
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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.