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Finding the Fourth Proportional to 290,437.80, 435,456.90 and 148,007.40

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Solution

The fourth proportional to 290,437.80, 435,456.90 and 148,007.40 is: 221,909.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,437.80 : 435,456.90 = 148,007.40 : x
  2. Step 2: Convert to fraction form
    290,437.80/435,456.90 = 148,007.40/x
  3. Step 3: Cross multiply
    290,437.80x = 435,456.90 × 148,007.40
  4. Step 4: Simplify right side
    290,437.80x = 64,450,843,581.06
  5. Step 5: Solve for x
    x = 64,450,843,581.06/290,437.80
  6. Step 6: Final answer
    x = 221,909.28

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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.