Home / 990,232-1,485,538.89-421,602.55

Finding the Fourth Proportional to 990,232, 1,485,538.89 and 421,602.55

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Solution

The fourth proportional to 990,232, 1,485,538.89 and 421,602.55 is: 632,485.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,232 : 1,485,538.89 = 421,602.55 : x
  2. Step 2: Convert to fraction form
    990,232/1,485,538.89 = 421,602.55/x
  3. Step 3: Cross multiply
    990,232x = 1,485,538.89 × 421,602.55
  4. Step 4: Simplify right side
    990,232x = 626,306,984,148.17
  5. Step 5: Solve for x
    x = 626,306,984,148.17/990,232
  6. Step 6: Final answer
    x = 632,485.10

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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.