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Finding the Fourth Proportional to 210,479.82, 290,376.14 and 155,421.06

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Solution

The fourth proportional to 210,479.82, 290,376.14 and 155,421.06 is: 214,417.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,479.82 : 290,376.14 = 155,421.06 : x
  2. Step 2: Convert to fraction form
    210,479.82/290,376.14 = 155,421.06/x
  3. Step 3: Cross multiply
    210,479.82x = 290,376.14 × 155,421.06
  4. Step 4: Simplify right side
    210,479.82x = 45,130,566,700.40
  5. Step 5: Solve for x
    x = 45,130,566,700.40/210,479.82
  6. Step 6: Final answer
    x = 214,417.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.