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Finding the Fourth Proportional to 518,421, 777,631.50 and 124,437

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Solution

The fourth proportional to 518,421, 777,631.50 and 124,437 is: 186,655.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,421 : 777,631.50 = 124,437 : x
  2. Step 2: Convert to fraction form
    518,421/777,631.50 = 124,437/x
  3. Step 3: Cross multiply
    518,421x = 777,631.50 × 124,437
  4. Step 4: Simplify right side
    518,421x = 96,766,130,965.50
  5. Step 5: Solve for x
    x = 96,766,130,965.50/518,421
  6. Step 6: Final answer
    x = 186,655.50

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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.