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Finding the Fourth Proportional to 605,426.40, 908,139.60 and 456,710.40

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Solution

The fourth proportional to 605,426.40, 908,139.60 and 456,710.40 is: 685,065.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,426.40 : 908,139.60 = 456,710.40 : x
  2. Step 2: Convert to fraction form
    605,426.40/908,139.60 = 456,710.40/x
  3. Step 3: Cross multiply
    605,426.40x = 908,139.60 × 456,710.40
  4. Step 4: Simplify right side
    605,426.40x = 414,756,799,971.84
  5. Step 5: Solve for x
    x = 414,756,799,971.84/605,426.40
  6. Step 6: Final answer
    x = 685,065.60

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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.