Home / 931,678.61-1,285,704.15-518,212.58

Finding the Fourth Proportional to 931,678.61, 1,285,704.15 and 518,212.58

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Solution

The fourth proportional to 931,678.61, 1,285,704.15 and 518,212.58 is: 715,126.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    931,678.61 : 1,285,704.15 = 518,212.58 : x
  2. Step 2: Convert to fraction form
    931,678.61/1,285,704.15 = 518,212.58/x
  3. Step 3: Cross multiply
    931,678.61x = 1,285,704.15 × 518,212.58
  4. Step 4: Simplify right side
    931,678.61x = 666,268,058,259.69
  5. Step 5: Solve for x
    x = 666,268,058,259.69/931,678.61
  6. Step 6: Final answer
    x = 715,126.50

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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.