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Finding the Fourth Proportional to 290,437.20, 435,655.80 and 190,904.40

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Solution

The fourth proportional to 290,437.20, 435,655.80 and 190,904.40 is: 286,356.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,437.20 : 435,655.80 = 190,904.40 : x
  2. Step 2: Convert to fraction form
    290,437.20/435,655.80 = 190,904.40/x
  3. Step 3: Cross multiply
    290,437.20x = 435,655.80 × 190,904.40
  4. Step 4: Simplify right side
    290,437.20x = 83,168,609,105.52
  5. Step 5: Solve for x
    x = 83,168,609,105.52/290,437.20
  6. Step 6: Final answer
    x = 286,356.60

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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.