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Finding the Fourth Proportional to 691,803.60, 954,543.40 and 420,014.32

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Solution

The fourth proportional to 691,803.60, 954,543.40 and 420,014.32 is: 579,531.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,803.60 : 954,543.40 = 420,014.32 : x
  2. Step 2: Convert to fraction form
    691,803.60/954,543.40 = 420,014.32/x
  3. Step 3: Cross multiply
    691,803.60x = 954,543.40 × 420,014.32
  4. Step 4: Simplify right side
    691,803.60x = 400,921,897,061.49
  5. Step 5: Solve for x
    x = 400,921,897,061.49/691,803.60
  6. Step 6: Final answer
    x = 579,531.38

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Double scale
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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.