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Finding the Fourth Proportional to 287,590.70, 431,386.05 and 236,852.30

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Solution

The fourth proportional to 287,590.70, 431,386.05 and 236,852.30 is: 355,278.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,590.70 : 431,386.05 = 236,852.30 : x
  2. Step 2: Convert to fraction form
    287,590.70/431,386.05 = 236,852.30/x
  3. Step 3: Cross multiply
    287,590.70x = 431,386.05 × 236,852.30
  4. Step 4: Simplify right side
    287,590.70x = 102,174,778,130.42
  5. Step 5: Solve for x
    x = 102,174,778,130.42/287,590.70
  6. Step 6: Final answer
    x = 355,278.45

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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.