Home / 917,381.40-1,376,072.10-385,284.30

Finding the Fourth Proportional to 917,381.40, 1,376,072.10 and 385,284.30

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Solution

The fourth proportional to 917,381.40, 1,376,072.10 and 385,284.30 is: 577,926.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,381.40 : 1,376,072.10 = 385,284.30 : x
  2. Step 2: Convert to fraction form
    917,381.40/1,376,072.10 = 385,284.30/x
  3. Step 3: Cross multiply
    917,381.40x = 1,376,072.10 × 385,284.30
  4. Step 4: Simplify right side
    917,381.40x = 530,178,975,798.03
  5. Step 5: Solve for x
    x = 530,178,975,798.03/917,381.40
  6. Step 6: Final answer
    x = 577,926.45

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.