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Finding the Fourth Proportional to 288,042.30, 432,063.45 and 260,048.70

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Solution

The fourth proportional to 288,042.30, 432,063.45 and 260,048.70 is: 390,073.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,042.30 : 432,063.45 = 260,048.70 : x
  2. Step 2: Convert to fraction form
    288,042.30/432,063.45 = 260,048.70/x
  3. Step 3: Cross multiply
    288,042.30x = 432,063.45 × 260,048.70
  4. Step 4: Simplify right side
    288,042.30x = 112,357,538,490.02
  5. Step 5: Solve for x
    x = 112,357,538,490.02/288,042.30
  6. Step 6: Final answer
    x = 390,073.05

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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.