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Finding the Fourth Proportional to 553,677.20, 830,515.80 and 548,428.40

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Solution

The fourth proportional to 553,677.20, 830,515.80 and 548,428.40 is: 822,642.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,677.20 : 830,515.80 = 548,428.40 : x
  2. Step 2: Convert to fraction form
    553,677.20/830,515.80 = 548,428.40/x
  3. Step 3: Cross multiply
    553,677.20x = 830,515.80 × 548,428.40
  4. Step 4: Simplify right side
    553,677.20x = 455,478,451,368.72
  5. Step 5: Solve for x
    x = 455,478,451,368.72/553,677.20
  6. Step 6: Final answer
    x = 822,642.60

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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.