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Finding the Fourth Proportional to 707,555.12, 976,417.56 and 385,265.12

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Solution

The fourth proportional to 707,555.12, 976,417.56 and 385,265.12 is: 531,661.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,555.12 : 976,417.56 = 385,265.12 : x
  2. Step 2: Convert to fraction form
    707,555.12/976,417.56 = 385,265.12/x
  3. Step 3: Cross multiply
    707,555.12x = 976,417.56 × 385,265.12
  4. Step 4: Simplify right side
    707,555.12x = 376,179,628,423.51
  5. Step 5: Solve for x
    x = 376,179,628,423.51/707,555.12
  6. Step 6: Final answer
    x = 531,661.23

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Half scale
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Double scale
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Similar ratio
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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.