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Finding the Fourth Proportional to 660,012.30, 910,817.34 and 358,206.30

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Solution

The fourth proportional to 660,012.30, 910,817.34 and 358,206.30 is: 494,324.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,012.30 : 910,817.34 = 358,206.30 : x
  2. Step 2: Convert to fraction form
    660,012.30/910,817.34 = 358,206.30/x
  3. Step 3: Cross multiply
    660,012.30x = 910,817.34 × 358,206.30
  4. Step 4: Simplify right side
    660,012.30x = 326,260,509,337.24
  5. Step 5: Solve for x
    x = 326,260,509,337.24/660,012.30
  6. Step 6: Final answer
    x = 494,324.89

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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.