Home / 763,266.30-1,144,899.45-390,018.30

Finding the Fourth Proportional to 763,266.30, 1,144,899.45 and 390,018.30

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Solution

The fourth proportional to 763,266.30, 1,144,899.45 and 390,018.30 is: 585,027.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,266.30 : 1,144,899.45 = 390,018.30 : x
  2. Step 2: Convert to fraction form
    763,266.30/1,144,899.45 = 390,018.30/x
  3. Step 3: Cross multiply
    763,266.30x = 1,144,899.45 × 390,018.30
  4. Step 4: Simplify right side
    763,266.30x = 446,531,737,159.94
  5. Step 5: Solve for x
    x = 446,531,737,159.94/763,266.30
  6. Step 6: Final answer
    x = 585,027.45

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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.