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Finding the Fourth Proportional to 390,752.40, 586,128.60 and 233,288.40

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Solution

The fourth proportional to 390,752.40, 586,128.60 and 233,288.40 is: 349,932.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,752.40 : 586,128.60 = 233,288.40 : x
  2. Step 2: Convert to fraction form
    390,752.40/586,128.60 = 233,288.40/x
  3. Step 3: Cross multiply
    390,752.40x = 586,128.60 × 233,288.40
  4. Step 4: Simplify right side
    390,752.40x = 136,737,003,288.24
  5. Step 5: Solve for x
    x = 136,737,003,288.24/390,752.40
  6. Step 6: Final answer
    x = 349,932.60

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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.