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Finding the Fourth Proportional to 609,718.10, 840,056.06 and 402,618.71

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Solution

The fourth proportional to 609,718.10, 840,056.06 and 402,618.71 is: 554,719.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,718.10 : 840,056.06 = 402,618.71 : x
  2. Step 2: Convert to fraction form
    609,718.10/840,056.06 = 402,618.71/x
  3. Step 3: Cross multiply
    609,718.10x = 840,056.06 × 402,618.71
  4. Step 4: Simplify right side
    609,718.10x = 338,222,290,311.57
  5. Step 5: Solve for x
    x = 338,222,290,311.57/609,718.10
  6. Step 6: Final answer
    x = 554,719.13

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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.