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Finding the Fourth Proportional to 518,948.40, 778,276.80 and 164,071.20

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Solution

The fourth proportional to 518,948.40, 778,276.80 and 164,071.20 is: 246,060.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,948.40 : 778,276.80 = 164,071.20 : x
  2. Step 2: Convert to fraction form
    518,948.40/778,276.80 = 164,071.20/x
  3. Step 3: Cross multiply
    518,948.40x = 778,276.80 × 164,071.20
  4. Step 4: Simplify right side
    518,948.40x = 127,692,808,508.16
  5. Step 5: Solve for x
    x = 127,692,808,508.16/518,948.40
  6. Step 6: Final answer
    x = 246,060.70

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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.