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Finding the Fourth Proportional to 391,488.45, 540,228.47 and 230,312.35

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Solution

The fourth proportional to 391,488.45, 540,228.47 and 230,312.35 is: 317,815.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,488.45 : 540,228.47 = 230,312.35 : x
  2. Step 2: Convert to fraction form
    391,488.45/540,228.47 = 230,312.35/x
  3. Step 3: Cross multiply
    391,488.45x = 540,228.47 × 230,312.35
  4. Step 4: Simplify right side
    391,488.45x = 124,421,288,462.61
  5. Step 5: Solve for x
    x = 124,421,288,462.61/391,488.45
  6. Step 6: Final answer
    x = 317,815.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.