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Finding the Fourth Proportional to 518,315.40, 777,818.70 and 237,688.20

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Solution

The fourth proportional to 518,315.40, 777,818.70 and 237,688.20 is: 356,690.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,315.40 : 777,818.70 = 237,688.20 : x
  2. Step 2: Convert to fraction form
    518,315.40/777,818.70 = 237,688.20/x
  3. Step 3: Cross multiply
    518,315.40x = 777,818.70 × 237,688.20
  4. Step 4: Simplify right side
    518,315.40x = 184,878,326,729.34
  5. Step 5: Solve for x
    x = 184,878,326,729.34/518,315.40
  6. Step 6: Final answer
    x = 356,690.78

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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.