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Finding the Fourth Proportional to 518,880.60, 778,320.90 and 430,307.10

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Solution

The fourth proportional to 518,880.60, 778,320.90 and 430,307.10 is: 645,460.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,880.60 : 778,320.90 = 430,307.10 : x
  2. Step 2: Convert to fraction form
    518,880.60/778,320.90 = 430,307.10/x
  3. Step 3: Cross multiply
    518,880.60x = 778,320.90 × 430,307.10
  4. Step 4: Simplify right side
    518,880.60x = 334,917,009,348.39
  5. Step 5: Solve for x
    x = 334,917,009,348.39/518,880.60
  6. Step 6: Final answer
    x = 645,460.65

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Double scale
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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.