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Finding the Fourth Proportional to 518,854.85, 778,282.28 and 430,281.35

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Solution

The fourth proportional to 518,854.85, 778,282.28 and 430,281.35 is: 645,422.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,854.85 : 778,282.28 = 430,281.35 : x
  2. Step 2: Convert to fraction form
    518,854.85/778,282.28 = 430,281.35/x
  3. Step 3: Cross multiply
    518,854.85x = 778,282.28 × 430,281.35
  4. Step 4: Simplify right side
    518,854.85x = 334,880,347,968.07
  5. Step 5: Solve for x
    x = 334,880,347,968.07/518,854.85
  6. Step 6: Final answer
    x = 645,422.03

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Similar ratio
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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.