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Finding the Fourth Proportional to 390,854.60, 586,281.90 and 201,897.80

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Solution

The fourth proportional to 390,854.60, 586,281.90 and 201,897.80 is: 302,846.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,854.60 : 586,281.90 = 201,897.80 : x
  2. Step 2: Convert to fraction form
    390,854.60/586,281.90 = 201,897.80/x
  3. Step 3: Cross multiply
    390,854.60x = 586,281.90 × 201,897.80
  4. Step 4: Simplify right side
    390,854.60x = 118,369,025,789.82
  5. Step 5: Solve for x
    x = 118,369,025,789.82/390,854.60
  6. Step 6: Final answer
    x = 302,846.70

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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.