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Finding the Fourth Proportional to 711,256.80, 997,418.40 and 711,256.80

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Solution

The fourth proportional to 711,256.80, 997,418.40 and 711,256.80 is: 997,418.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,256.80 : 997,418.40 = 711,256.80 : x
  2. Step 2: Convert to fraction form
    711,256.80/997,418.40 = 711,256.80/x
  3. Step 3: Cross multiply
    711,256.80x = 997,418.40 × 711,256.80
  4. Step 4: Simplify right side
    711,256.80x = 709,420,619,445.12
  5. Step 5: Solve for x
    x = 709,420,619,445.12/711,256.80
  6. Step 6: Final answer
    x = 997,418.40

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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.