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Finding the Fourth Proportional to 518,964.80, 778,389.60 and 425,307.20

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Solution

The fourth proportional to 518,964.80, 778,389.60 and 425,307.20 is: 637,913.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,964.80 : 778,389.60 = 425,307.20 : x
  2. Step 2: Convert to fraction form
    518,964.80/778,389.60 = 425,307.20/x
  3. Step 3: Cross multiply
    518,964.80x = 778,389.60 × 425,307.20
  4. Step 4: Simplify right side
    518,964.80x = 331,054,701,285.12
  5. Step 5: Solve for x
    x = 331,054,701,285.12/518,964.80
  6. Step 6: Final answer
    x = 637,913.60

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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.