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Finding the Fourth Proportional to 553,679.20, 830,518.80 and 548,430.40

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Solution

The fourth proportional to 553,679.20, 830,518.80 and 548,430.40 is: 822,645.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,679.20 : 830,518.80 = 548,430.40 : x
  2. Step 2: Convert to fraction form
    553,679.20/830,518.80 = 548,430.40/x
  3. Step 3: Cross multiply
    553,679.20x = 830,518.80 × 548,430.40
  4. Step 4: Simplify right side
    553,679.20x = 455,481,757,691.52
  5. Step 5: Solve for x
    x = 455,481,757,691.52/553,679.20
  6. Step 6: Final answer
    x = 822,645.60

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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.