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Finding the Fourth Proportional to 612,115.40, 857,661.40 and 612,115.40

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Solution

The fourth proportional to 612,115.40, 857,661.40 and 612,115.40 is: 857,661.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,115.40 : 857,661.40 = 612,115.40 : x
  2. Step 2: Convert to fraction form
    612,115.40/857,661.40 = 612,115.40/x
  3. Step 3: Cross multiply
    612,115.40x = 857,661.40 × 612,115.40
  4. Step 4: Simplify right side
    612,115.40x = 524,987,750,925.56
  5. Step 5: Solve for x
    x = 524,987,750,925.56/612,115.40
  6. Step 6: Final answer
    x = 857,661.40

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.